CN202232943U - Tobacco material redrying device - Google Patents
Tobacco material redrying device Download PDFInfo
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- CN202232943U CN202232943U CN2011203974411U CN201120397441U CN202232943U CN 202232943 U CN202232943 U CN 202232943U CN 2011203974411 U CN2011203974411 U CN 2011203974411U CN 201120397441 U CN201120397441 U CN 201120397441U CN 202232943 U CN202232943 U CN 202232943U
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- baking
- conduction oil
- redrying
- cylinder
- heat exchanger
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Abstract
The utility model provides a leaf or stem redrying device which has simplicity, high efficiency, low processing intensity and uniform drying. The redrying device comprises a drying roller erected on a stand and a hot blast system, wherein a plurality of conduction oil heat exchange tubes are evenly arranged in parallel on the outer wall face of the drying roller, and the conduction oil heat exchange tubes are communicated with a conduction oil loop heating system; a preheating section is from the feed end of the drying roller to about 1/3 of total length of the drying roller, the rest 2/3 section is a drying section, the feed end of the drying roller is higher than the discharge end, and a shoveling plate and a material receiving sliding plate are arranged in the roller. With the device, the tobacco material can be directly redried to meet tobacco material water content and temperature required by the next procedure only through the heating drying procedure, the procedure is simple and efficient, saves energy and protects environment.
Description
Technical field
The utility model relates to a kind of tobacco redrying equipment in the tobacco threshing redrying technical field.
Background technology
As shown in Figure 1; Existing tobacco redrying technology is with the junior tobacco leaf heat drying, cools off and then the processing that gets damp again; With the control of tobacco leaf moisture content within the specific limits; Promote the tobacco leaf physicochemical property to change,, and help tobacco leaf long term storage and alcoholization with the raising quality of tobacco towards the direction that helps processing.
According to the difference of redrying object, existing redrying machine can be divided into blade redrying machine and offal redrying machine.Because the physical behavior of blade and offal is different, so in beating and double roasting is produced, should carry out redrying to blade and offal respectively usually, so that its contained humidity satisfies process requirements.
Mostly redrying equipment is tunnel type mesh-belt conveying redrying machine both at home and abroad at present, and blade redrying machine and offal redrying machine are all with convection heat transfer' heat-transfer by convection mode dried material.In dry run, material absorbs heat from hot-air after, the moisture vaporization gets into hot-air, and humidity increase, the temperature of hot-air are descended.In order to keep the relatively stable of hot-air humiture, the hot air system hot-air that a part of humidity is higher is discharged from exhaust outlet, replenishes a part of fresh air simultaneously.
In dry run, the rate of drying of material and the temperature of hot-air and air-flow see through the material bed speed of guipure and are proportionate.Temperature is high, when speed is big, dry materials gets soon; Otherwise dry materials gets slowly.But in dry run, the temperature of circulating air is unsuitable too high, and the too high meeting of temperature makes the aroma substance volatilization in the material, causes the cigarette quality to descend.Circulating air also is difficult for too fast through material bed speed, it is floating that excessive velocities can make material take place.Generally speaking, the maximum temperature of circulating air should be controlled at below 120 ℃, and the wire side mean wind speed should be controlled at per second below 0.7 meter.Simultaneously, in dry run, the rate of drying of material and wire side material thickness are negative correlation.The wire side material is thick, and dry materials gets slowly; Otherwise dry materials gets soon.Under the certain condition of circulating air flow velocity, humiture, when the shop layer thickness of material was thin, drying effect was better.Therefore generally speaking, material shop layer thickness will be controlled at 80～100 millimeters.In addition, if the redrying material is a blade, also should cools off after the drying, get damp again.The speed that the moisture regain speed of blade and the humiture of recirculated hot air and air communication are crossed wire side is proportionate, and is negative correlation with the shop leaf thickness.Generally speaking, the temperature of its moisture regain air-flow is 45 ℃～55 ℃, and the humidity of the air-flow that gets damp again this moment is near saturated.
In sum, there is following problem in present blade redrying Processes and apparatus: the one, and redrying process temperature is still higher, causes the tabacco fragrance loss bigger; The 2nd, the redrying complex process, as shown in Figure 1, in the process of redrying blade, blade will pass through the drying of several dry sections, and moisture content drops to 9%～10% by 20%, and then it is cooled to 12.5% the moisture of getting damp again again behind 8%～9% moisture; The 3rd, the leaf water uniformity after the redrying is relatively poor, all is that static relatively the dividing on the wide guipure of 3m to 4m of 80～100mm thickness carried out in the overall process of vanes super-dry, cooling and moisture regain, causes the uniformity of its drying, cooling and moisture regain all very poor; The 4th, the redrying equipment volume is huge, safeguards and the use cost height, is unfavorable for energy-conserving and environment-protective etc.
Therefore, require to promote raw tobacco material use value to the Chinese style cigarette, energy-saving and cost-reducing production demand is necessary to design a kind of simple, energy-efficient, low processing intensity and stable redrying processing technology and the equipment of uniform drying.
Summary of the invention
Have problems to above-mentioned existing redrying technology, the utility model aims to provide a kind of simple, efficient, low processing intensity and the blade of uniform drying or redrying equipment of offal realized.
The said tobacco redrying of the utility model equipment comprises redrying chamber and hot-air system, and said redrying chamber is decided to be one and is erected at the baking cylinder that is respectively equipped with the input and output material cover on the frame and at two ends; Installed the some conduction oil heat exchanger tubes that are arranged in parallel along the outside wall surface five equilibrium on the said baking cylinder outer wall face, the conduction oil heat exchanger tube is communicated with the conduction oil loop heating system; The baking cylinder is preheating section from feed end to 1/3 section that toasts the cylinder length overall approximately, and all the other 2/3 section be dryer section, and the conduction oil heat exchanger tube distributed quantity in the preheating section barrel outside is half of dryer section; The feed end of baking cylinder is higher than discharge end.
Said preheating section and dryer section are provided with barrel temperature and hot blast temperature regulation device respectively, are used for the desired treatment temp of accuracy controlling redrying technical process.
The utility model adopts heat conduction oil type baking cylinder as tobacco redrying equipment; Adopt the conduction oil loop heating system that the conduction oil heat transfer medium is provided; Conduction oil is full of conduction oil heat exchanger tube and the circulation heating continuously that is laid in the baking cylinder wall rapidly under the effect of pump pressure, and baking barrel and hot blast temperature are uniform and stable, can make redrying technology simple, efficient; And the low processing of material processing procedure intensity, to handle dry materials even.And on the baking cylinder, set up preheating section and dryer section separately; Make its barrel temperature and hot blast temperature separately be independent adjustable controlled; Regulate control range and can reach 30 ℃～120 ℃, the adjustment response rapidly, the system temperature control accuracy can reach ± 1 ℃ of scope in, the thermal efficiency is high; The different redrying PROCESS FOR TREATMENT needs that comprise blade or offal different material have been satisfied in energy-conserving and environment-protective, the utmost point easily.
Secondly; In order to improve the redrying quality; Avoid in the redrying process tobacco conglomeration or shed inhomogeneously, reduce blade upset degreeof tortuosity in the baking tube in the redrying process, effectively reduce blade curling in the redrying process; Alleviate the processing intensity of tobacco in the redrying process, be fixed with some and on the said baking inner wall of rotary drum face along the flight of branch parallel arrangements such as internal face; Be axially arranged with connect material slide plate along cylindrical shell in baking in the cylinder, this slide plate that connects material begins tiltingly to toasting cylinder tube lower inside from toasting in the cylinder tube tobacco discharging point, and is fixed on the frame, does not rotate with the baking roller tube.
Simultaneously, for controlling the material processing time easily, the baking roller tube is provided with the inclination angle and is preferably 5 ° of 2 °-∠ of ∠.The tobacco leaf material is fed to discharging time and was controlled at 4～5 minutes with moving to discharge end from feed end in the cylindrical shell rotating process.
Described hot-air system is the hot blast internal circulation system, comprises the air intake cover that is communicated with baking cylinder discharging cover, and the heat exchanger that is communicated with the air intake cover other end reaches airduct, blower fan.
The heat exchanger of said hot-air system can be the conduction oil type heat exchanger, and it is communicated with the conduction oil loop heating system, to simplify the setting of hot air heating system.Hot-air system also can be provided with dust pelletizing system simultaneously, cleaning hot blast in the hot blast humidity discharging, energy-conserving and environment-protective.
In the equipment running process, hot blast is with respect to the reverse entering of input and output material direction of tobacco, and the convective heat exchange of itself and tobacco is reverse-flow.Hot blast recycles after through dedusting, and the humidity discharging amount of total blast volume 10%～40% is adjustable controlled.
The import of each conduction oil heat exchanger tube, outlet respectively be arranged at oil inlet pipe and the oil return pipe of baking on the cylinder and be communicated with, oil inlet pipe on the baking cylinder and oil return pipe pass through swivel joint and are communicated with the conduction oil loop heating system.
Utilize the utility model, can directly the tobacco redrying be dried to desired tobacco moisture content of next step operation and temperature only through said heat drying operation.Specifically; Can directly needed about 12.5% the moisture content of next technology be arrived in the blade or the redrying of offal material of 20% left and right sides moisture content; And no longer need replenish the moisture regain operation, and saved cooling and the technical process of moisture regain in the former redrying technology, technical process is more simple.Secondly, blade or offal after using 40 ℃～60 ℃ low temperature to wind dispensing carry out preheating, and dry effect is also arranged simultaneously, can alleviate blade or offal and be rapidly heated and big and the curling or contraction of producing of the temperature difference; Preheating rear blade or offal carry out drying under 50 ℃～70 ℃ temperature, dry rear blade or offal directly reach desired moisture content of redrying technology and temperature, have reduced the loss of blade fragrance in the redrying process.
The advantage of the utility model comprises: 1, technical process is few, the equipment simple-to-maintain is easy to use, and equipment investment, maintenance and use cost are low; 2, with the conduction oil recirculation heater thermal source is provided, conduction oil can be recycled, and the thermal efficiency is high, energy-conserving and environment-protective; 3, drying cylinder wall and hot blast temperature are uniform and stable, the adjustment response is rapid, the system temperature control accuracy is accurate; 4, discharging moisture content is uniform and stable, and the redrying temperature is low, machining path short, and fragrance loss is little.
In sum, the utility model can satisfy simple at present, efficient, low processing intensity and the blade of uniform drying and the redrying process requirements of offal, has also solved the insurmountable problems of existing redrying Processes and apparatus simultaneously well.
Description of drawings
Fig. 1: existing redrying process chart;
Fig. 2: the tobacco multiple roasting method flow chart that utilizes the utility model to realize;
Fig. 3: be the said tobacco redrying of the utility model outfit of equipment structural representation;
Fig. 4: be Fig. 1 plan structure sketch map;
Fig. 5: be Fig. 1 side-looking structural representation;
Fig. 6: be the baking roller frame sketch map that the utility model adopted;
Fig. 7: be the baking cylinder cross-sectional view that the utility model adopted;
Fig. 8: be the dryer section conduction oil heat exchanger tube profile structural representation of the baking cylinder that the utility model adopted;
Fig. 9: be the preheating section conduction oil heat exchanger tube profile structural representation of the baking cylinder that the utility model adopted.
Among the figure: 1 ﹑ frame; 1-1, support wheel; 2, baking tube; 2-1, driving gear ring; 2-2, cylindrical shell; 2-3, oil return pipe; 2-4, oil inlet pipe; 2-5, bracing ring; 2-6, flight; 2-7, connecting plate; 2-8, sliding plate; 2-9, conduction oil heat exchanger tube; 3, hot air circulating system; 3-1, air intake cover; 3-2, heat exchanger; 3-3, three-way pipe; 3-4, blower fan; 3-5, deduster; 3-6, airduct; 4, cylindrical shell drive unit; 5, discharging cover; 6, conduction oil loop heating system; 6-1, heat conduction oil type swivel joint; 7, charging cover;
A, charging aperture; B, discharging opening; C, humidity discharging mouth; D, wind-supplying mouth; E, conduction oil flowline; F, conduction oil oil inlet pipe; G, feed end; H, discharge end; I, preheating section; J, dryer section.
The specific embodiment
As shown in Figure 2; With respect to existing tobacco redrying technology shown in Figure 1; The multiple roasting method that utilizes the utility model to realize only comprises preheating and dry two steps; Being about to pretreated blade or offal sends in the said redrying machine of the utility model and carries out preheating and drying, needed moisture content of convection drying to next technology and temperature.
Like Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, the said redrying machine of the utility model comprises frame 1, baking tube 2, hot air circulating system 3, cylindrical shell drive unit 4, discharging cover 5, conduction oil loop heating system 6, charging cover 7.Baking tube 2 is installed on the support wheel 1-1 at frame 1 two ends, and baking 2 front end are provided with and drive gear ring 2-1, and the rear end is provided with bracing ring 2-5, drives gear ring 2-1 and under the driving of cylindrical shell drive unit 4, drives 2 rotations of baking tube.It is 5 ° of 2 °-∠ of ∠ that baking tube 2 bodies are provided with the inclination angle, and its feed end is higher than discharge end, is convenient to by the charging and discharging of redrying material.
Like Fig. 3 and shown in Figure 6, the feed end G and the discharging H of baking tube 2 are respectively equipped with charging cover 7 and discharging cover 5, are convenient to the collection of material and hot blast and flying dust, and charging aperture A, discharging opening B are set respectively on charging cover 7 and the discharging cover 5.Charging cover 7 is fixed on the frame 1 with discharging cover 5 bases, and it does not rotate with baking tube 2.
Like Fig. 3 and Fig. 4, shown in Figure 5; Baking tube 2 tops are provided with hot air circulating system 3, and hot blast is via air intake cover 3-1, in the discharge end entering baking tube 2 by baking tube 2; Flow to the feed end of baking tube 2 along material direction adverse current; Accomplish simultaneously with by the heat exchange of redrying storeroom, pass through deduster 3-5 dedusting in the hot air circulating system 3, the humidity discharging mouth C humidity discharging on the three-way pipe 3-3 then after, after heating once more through heat exchanger 3-2; Recycle in the entering baking tube 2 once more, and can mend into air quantity with auxiliary adjustment hot blast temperature and humidity discharging amount through wind-supplying mouth D.Hot blast is adverse current in baking tube 2, and wind-warm syndrome has successively decreases, and helps improving the pre-heat effect by the redrying material.The humidity discharging amount of total blast volume 10%～40% is adjustable controlled, and it is controlled that hot blast temperature is adjustable, regulates control range at 30 ℃～120 ℃, can satisfy the different process demand.
Like Fig. 3, Fig. 6 and shown in Figure 7, baking tube 2 comprises driving gear ring 2-1, cylindrical shell 2-2, oil return pipe 2-3, oil inlet pipe 2-4, bracing ring 2-5, flight 2-6, connecting plate 2-7, sliding plate 2-8, conduction oil heat exchanger tube 2-9.Wherein, oil return pipe 2-3, oil inlet pipe 2-4 are communicated with conduction oil heat exchanger tube 2-9 respectively.Baking tube 2 is preheating section I from feed end to 1/3 section of its length overall, and discharge end to length overall is dryer section J for 2/3 section.Like Fig. 8, shown in Figure 9; The quantity that preheating section I barrel outside conduction oil heat exchanger tube 2-9 distributes is the half the of dryer section J; The barrel temperature of baking tube 2 preheating section I and dryer section J is independent adjustable controlled, regulates control range at 30 ℃～120 ℃, can satisfy the different process demand.
Like Fig. 3, shown in Figure 6; Baking tube 2 discharge ends are provided with heat conduction oil type swivel joint 6-1; Its role is to conduction oil loop heating system 6 and be connected, solve conduction oil oil inlet pipe F and the conduction oil flowline E of 2 rotations of baking tube and conduction oil loop heating system 6 and be connected contradiction between non-rotatable with transition between the rotatable cooking tube 2.Adopt the conduction oil recirculation heater as the thermal source generator, conduction oil is as heat transfer medium, and heat transfer efficiency is high; And the conduction oil sealing and circulating is used; Engine pressure (be full of each tiny die cavity of system and circulation heating continuously under≤0.3Mpa) the effect rapidly, the baking barrel and hot blast temperature is uniform and stable, the adjustment response rapidly, the system temperature control accuracy can reach ± 1 ℃ of scope in, the thermal efficiency is high; Operational reliability is high, energy-conserving and environment-protective.
As shown in Figure 7; Baking tube 2 inwalls be provided with even distribution and along drum shaft to the height-adjustable flight 2-6 that is provided with; Be provided with sliding plate 2-8 in the baking tube 2, sliding plate 2-8 is from 10 positions (analogy clock and watch), i.e. the setting point of material in baking tube 2; Begin tilting and extend to toast the tube side lower part, and do not rotate with baking tube 2.This can reduce blade upset number of times and degreeof tortuosity in baking tube 2 in the redrying process, effectively reduces the crimpness of blade in the redrying process.For making the upset of material in the baking tube more soft, sliding plate 2-8 is set to the inner arc panel that slightly is bent upwards as shown in Figure 7.
As shown in Figure 3; Got in the baking tube 2 from charging aperture by the redrying material; Under the effect that baking tube 2 rotates, will be carried and discharging to discharging opening by the redrying material; In the process that discharging opening is carried, accomplished and toast the heat transmission between barrel by the redrying material at quilt, accomplish, realize the purpose of redrying processing by the process of the preheating of redrying material, drying.
In addition; Moisture situation according to supplied materials; The adjusting of humidity discharging amount, hot-air system can add a certain amount of steam and toast the discharging moisture after an adjusting that 2 interior discharging sections can add the hot water amount comes the tracking Control redrying; To reach the uniform and stable purpose of discharging moisture content, fully satisfy the requirement of threshing redrying plant tobacco leaf material redrying technology.
Claims (7)
1. a tobacco redrying equipment comprises redrying chamber and hot-air system, it is characterized in that: said redrying chamber is decided to be one and is erected at the baking cylinder that is respectively equipped with the input and output material cover on the frame and at two ends; Installed the some conduction oil heat exchanger tubes that are arranged in parallel along the outside wall surface five equilibrium on the said baking cylinder outer wall face, the conduction oil heat exchanger tube is communicated with the conduction oil loop heating system; The baking cylinder is preheating section from feed end to 1/3 section that toasts the cylinder length overall approximately, and all the other 2/3 section be dryer section, and the conduction oil heat exchanger tube distributed quantity in the preheating section barrel outside is half of dryer section; The feed end of baking cylinder is higher than discharge end.
2. tobacco redrying equipment according to claim 1 is characterized in that: be fixed with some and along the flight of branch parallel arrangements such as internal face on the said baking inner wall of rotary drum face; Be axially arranged with connect material slide plate along cylindrical shell in baking in the cylinder, this slide plate that connects material begins tiltingly to toasting cylinder tube lower inside from toasting in the cylinder tube tobacco discharging point, and is fixed on the frame, does not rotate with the baking roller tube.
3. tobacco redrying equipment according to claim 1 and 2 is characterized in that: it is 5 ° of 2 °-∠ of ∠ that the baking roller tube is provided with the inclination angle.
4. tobacco redrying equipment according to claim 1 and 2, it is characterized in that: described hot-air system is the hot blast internal circulation system, comprises the air intake cover that is communicated with baking cylinder discharging cover, the heat exchanger that is communicated with the air intake cover other end reaches airduct, blower fan.
5. tobacco redrying equipment according to claim 4 is characterized in that: said heat exchanger is the conduction oil type heat exchanger, and it is communicated with the conduction oil loop heating system.
6. tobacco redrying equipment according to claim 1 and 2; It is characterized in that: the import of each conduction oil heat exchanger tube, outlet respectively be arranged at oil inlet pipe and the oil return pipe of baking on the cylinder and be communicated with, oil inlet pipe on the baking cylinder and oil return pipe pass through swivel joint and are communicated with the conduction oil loop heating system.
7. tobacco redrying equipment according to claim 1 and 2 is characterized in that: said preheating section and dryer section are provided with barrel temperature and hot blast temperature regulation device respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203974411U CN202232943U (en) | 2011-10-19 | 2011-10-19 | Tobacco material redrying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203974411U CN202232943U (en) | 2011-10-19 | 2011-10-19 | Tobacco material redrying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202232943U true CN202232943U (en) | 2012-05-30 |
Family
ID=46094273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203974411U Withdrawn - After Issue CN202232943U (en) | 2011-10-19 | 2011-10-19 | Tobacco material redrying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202232943U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423109A (en) * | 2011-10-19 | 2012-04-25 | 江苏智思机械集团有限公司 | Tobacco material redrying equipment and method |
| CN103156269A (en) * | 2013-03-07 | 2013-06-19 | 红云红河烟草(集团)有限责任公司 | Drying method capable of improving cut tobacco processing quality |
| CN104172456A (en) * | 2013-05-23 | 2014-12-03 | 豪尼机械制造股份公司 | Drum dryer for drying tobacco, and related drying method |
| CN104886746A (en) * | 2014-03-05 | 2015-09-09 | 豪尼机械制造股份公司 | Media connect device for a drying drum of the tobacco processing industry |
| CN105120693A (en) * | 2013-05-01 | 2015-12-02 | 迪更生莱格有限公司 | Drying apparatus |
| CN105639713A (en) * | 2016-04-14 | 2016-06-08 | 龙岩烟草工业有限责任公司 | Adjustable harrow spike, roller and harrow spike adjusting method |
| CN108283326A (en) * | 2017-01-10 | 2018-07-17 | 秦皇岛烟草机械有限责任公司 | A kind of combined type tobacco drying equipment |
| CN110353296A (en) * | 2019-06-21 | 2019-10-22 | 红塔烟草(集团)有限责任公司 | A kind of fluidized bed tobacco redrying system |
| CN110742297A (en) * | 2019-11-26 | 2020-02-04 | 贵州中烟工业有限责任公司 | Hot air system of barrel type burley tobacco baking dryer heating area |
| CN112450479A (en) * | 2020-10-10 | 2021-03-09 | 云南烟叶复烤有限责任公司麒麟复烤厂 | Experimental method and device for directly drying and redrying tobacco flakes |
-
2011
- 2011-10-19 CN CN2011203974411U patent/CN202232943U/en not_active Withdrawn - After Issue
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423109A (en) * | 2011-10-19 | 2012-04-25 | 江苏智思机械集团有限公司 | Tobacco material redrying equipment and method |
| CN102423109B (en) * | 2011-10-19 | 2013-08-14 | 江苏智思机械集团有限公司 | Tobacco material redrying equipment and method |
| CN103156269A (en) * | 2013-03-07 | 2013-06-19 | 红云红河烟草(集团)有限责任公司 | Drying method capable of improving cut tobacco processing quality |
| CN105120693A (en) * | 2013-05-01 | 2015-12-02 | 迪更生莱格有限公司 | Drying apparatus |
| CN104172456A (en) * | 2013-05-23 | 2014-12-03 | 豪尼机械制造股份公司 | Drum dryer for drying tobacco, and related drying method |
| CN104886746A (en) * | 2014-03-05 | 2015-09-09 | 豪尼机械制造股份公司 | Media connect device for a drying drum of the tobacco processing industry |
| CN105639713A (en) * | 2016-04-14 | 2016-06-08 | 龙岩烟草工业有限责任公司 | Adjustable harrow spike, roller and harrow spike adjusting method |
| CN108283326A (en) * | 2017-01-10 | 2018-07-17 | 秦皇岛烟草机械有限责任公司 | A kind of combined type tobacco drying equipment |
| CN110353296A (en) * | 2019-06-21 | 2019-10-22 | 红塔烟草(集团)有限责任公司 | A kind of fluidized bed tobacco redrying system |
| CN110742297A (en) * | 2019-11-26 | 2020-02-04 | 贵州中烟工业有限责任公司 | Hot air system of barrel type burley tobacco baking dryer heating area |
| CN112450479A (en) * | 2020-10-10 | 2021-03-09 | 云南烟叶复烤有限责任公司麒麟复烤厂 | Experimental method and device for directly drying and redrying tobacco flakes |
| CN112450479B (en) * | 2020-10-10 | 2022-07-22 | 云南烟叶复烤有限责任公司麒麟复烤厂 | Equipment and method for directly drying and redrying tobacco flakes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120530 Effective date of abandoning: 20130814 |
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| RGAV | Abandon patent right to avoid regrant |