EP2897476A1 - Stromtrockner und stromtrocknungsverfahren zum trocknen eines tabakmaterials - Google Patents
Stromtrockner und stromtrocknungsverfahren zum trocknen eines tabakmaterialsInfo
- Publication number
- EP2897476A1 EP2897476A1 EP13758757.2A EP13758757A EP2897476A1 EP 2897476 A1 EP2897476 A1 EP 2897476A1 EP 13758757 A EP13758757 A EP 13758757A EP 2897476 A1 EP2897476 A1 EP 2897476A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- hot gas
- circuit
- pipe
- pipe section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/101—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
- F26B17/105—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis the shaft or duct, e.g. its axis, being other than straight, i.e. curved, zig-zag, closed-loop, spiral
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying goods
- F26B2200/22—Tobacco leaves
Definitions
- the invention relates to a current dryer for drying a tobacco material, comprising a first tube circuit for generating a circular hot gas stream, a tobacco inlet for introducing tobacco material to be dried into the hot gas stream and a separator for discharging dried tobacco material from the hot gas stream.
- the invention further relates to a corresponding current drying method.
- drying parameters in particular the hot gas temperature, the flow rate, the steam content etc., are defined by the area through which the tobacco flows.
- differently adjustable drying parameters may be desired over the region through which the tobacco flows.
- the object of the invention is to provide a current dryer and a current drying method, which allow a manageable extra effort and reduced space large flexibility and adjustability of the drying process.
- the invention solves this problem with the features of the independent claims. Due to the inventive interconnection of two pipe circuits, different drying parameters can be set in two different transport pipe sections, in particular the common transport pipe section and a further transport pipe section, which is assigned to only one pipe circuit. Thus, increased flexibility and adjustability of the drying process can be achieved. Due to the invention, flowed through by the tobacco material common transport pipe section, this can be achieved, in particular compared to a series connection of two complete power dryer, with reduced structural complexity and reduced space. A further reduction of the structural complexity and the installation space can be achieved if functional devices of the current dryer are shared by both pipe circuits.
- a common separator may advantageously be provided, which may be arranged, for example, at the end of the common transport pipe section through which the tobacco material flows.
- a tobacco inlet can be provided.
- a separator and / or a tobacco inlet can be saved in comparison to the series connection of two complete flow dryers.
- a through-flow of the tobacco material only one pipe cycle associated transport pipe section is provided which advantageously in the flow direction before the common transport pipe section is arranged.
- one of the transport pipe sections as a downpipe and formed as a riser.
- the tobacco material is conveyed pneumatically upwards by the hot gas flow and dried during the promotion.
- the downpipe the tobacco material falls down in the hot gas stream and is thereby dried. Due to the lower flow velocity, significantly higher drying temperatures can be set in the downpipe than in the riser pipe.
- the tobacco material can be dried over two drying stages at significantly different temperatures, significantly increasing the flexibility of the drying process.
- the tobacco material to be dried is usually pneumatically conveyed in a riser pipe with a hot process gas and thereby dried. Since a certain amount of process gas is required to convey the tobacco material to be dried, the energy required for drying can not be adapted to the input moisture of the tobacco material by substantially changing the process gas flow; This can only be done by adjusting the drying temperature accordingly. The drying temperature is therefore not freely selectable.
- drying is to be independent of temperature, the energy used for drying must be able to be influenced by changing process gas quantities. In this case, at high temperatures so low process gas quantities may be required that pneumatic delivery is no longer possible. At high temperatures it is therefore only possible to dry if the tobacco material to be dried no longer has to be conveyed through the process gas. Such a possibility arises when the tobacco material falls down gravity in a downpipe through which a hot process gas flows.
- the transport pipe section designed as a downpipe is arranged in the flow direction in front of the transport pipe section designed as a riser pipe.
- This allows the wet tobacco material to be first dried at high temperature and then finally dried at a lower temperature, which can positively affect the taste of the dried tobacco material.
- the moist tobacco material is in fact less affected by a higher drying temperature tasting than in a drier state.
- an increase in the tobacco filling power during high-temperature drying is also achieved since the drying rate increases due to the higher temperature difference and the fiber can be better inflated.
- the hot gas temperature in the only one pipe circuit associated transport pipe section is preferably higher than in the common transport pipe section. But this is not necessarily the case. Depending on the application, it may also be advantageous to operate the current dryer with reverse temperature conditions.
- the steam content of the process gas can be influenced at various positions, in particular by steam feed. Additionally or alternatively, an addition of fresh air and / or
- Fig. 1 is a schematic view of a current dryer in an embodiment of the invention
- Fig. 2 is a schematic view of a current dryer in another embodiment of the invention.
- Fig. 3 is a schematic view of a current dryer in a third embodiment of the invention.
- the current dryer 10 comprises a first pipe circuit 11 and a second pipe circuit 12.
- the first pipe circuit 11 has a (only) this associated transport pipe section 15, which is referred to below as the first transport pipe section 15.
- a first blower 16 and a first heating device 17, for example a heat exchanger, for generating and maintaining a first hot gas stream 18 having a first temperature Tl and a first flow velocity vi are arranged in the first transport pipe section 15.
- the second pipe circuit 12 has a (only) this associated transport pipe section 19, which is referred to below as the second transport pipe section 19.
- the length of the second transport pipe section 19 may be smaller, equal to or greater than the length of the first transport pipe section 15.
- a second blower 20 and a second heating device 21, for example a heat exchanger, for generating and maintaining a second hot gas stream 22 with a corresponding temperature and a corresponding flow rate are arranged.
- the first pipe circuit 11 opens by means of a In the first pipe branch 24 thus the hot gas streams 18, 22 of the two pipe circuits 11, 12 are combined to form a common hot gas stream 44. Downstream of the first pipe branch 24, this results in a common transport pipe section 14 of the two pipe circuits 11, 12.
- the entire hot gas stream 44 flows, ie the sum of the first and the second hot gas stream 18, 22.
- the common transport pipe section 14 branches at its end by means of a second branch pipe 25 in the first pipe circuit 11 and the second pipe circuit 12th
- a tobacco inlet 23 for introducing moist tobacco material into the transport tube section 15 is provided.
- the tobacco inlet 23 may, for example, a lock 38 and optionally an expansion device 39, for example an innowerwalze include.
- the arranged in the flow direction in front of the tobacco inlet 23 part 35 of the first transport pipe section 15 is not flowed through by tobacco material. From the tobacco inlet 23 of the registered tobacco falls down and is thereby from the first hot gas 18 with the first temperature Tl off or pre-dried.
- the part 36 of the transport pipe section 15 through which the tobacco material flows thus advantageously forms a downpipe 26.
- the downpipe 26 may in particular be arranged vertically.
- the tobacco inlet 23 is arranged at the upper end of the drop tube 26 after the above.
- the direction of flow of the first hot gas stream 18 in the downcomer 26 in this embodiment is the same as the tobacco drop direction, ie directed downwards.
- a blower may be provided in the non-tobacco flowed through part 31 of the common transport pipe section 14.
- at least two blowers are provided, which are arranged in different sections from the set (common transport pipe section 31, first transport pipe section 35, second transport pipe section 19) to the flow velocities vi, v2 of the hot gas flows 18, 22 in the first pipe circuit 11 and second pipe circuit 12 to be able to adjust independently.
- a heating device may be provided in the part 31 of the common transport pipe section 14 through which no tobacco flows.
- at least two heating devices are preferably provided which are arranged in different sections from the quantity (common transport pipe section 31, first transport pipe section 35, second transport pipe section 19) to the temperatures of the hot gas flows 18, 22 in the first pipe circuit 11 and the second pipe circuit 12 to be able to adjust independently.
- the downpipe 26 opens into the common transport pipe section 14 by means of the first pipe branch 24, which is arranged so that the tobacco is conveyed upwards by the hot gas flowing therein at a flow velocity v2 and finally dried at a temperature T2.
- the flowed through by the tobacco part 37 of the common transport pipe section 14 thus forms a riser 27.
- the temperature T2 of the hot gas flow in the riser 27 is about the temperature of the second hot gas flow means the second heater 21 to a desired value adjustable.
- the flow velocity v2 in the riser 27 is adjustable to a desired value via the flow velocity of the second hot gas stream by means of the second blower 20.
- the flow velocity v2 in the riser 27 is preferably at least 17 m / s. Due to the entry of the tobacco material through the pipe branch 24 into the second pipe circuit 12, the latter need not have a separate tobacco inlet.
- the current dryer therefore advantageously has only one tobacco inlet 23.
- the length and / or the cross section of the drop tube 26 may generally be smaller than, equal to or greater than the length or the cross section of the riser 27.
- a deflection of the tobacco-laden hot gas flow by 180 ° takes place between the first drying tube 26 and the second drying tube 27.
- the first and second drying tubes can thus advantageously be designed as a single double tube, whereby material and installation space can be saved.
- a partition wall 45 is offset relative to the end of the second transport pipe section 19 between the first drying pipe 26 and the second drying pipe 27, so that the hot gas flowing into the pipe branch 24 from the second transport pipe section does not enter the first drying pipe 26 counter to the intended flow direction. This offset V is clearly visible in FIG.
- a winnower roll 46 may be provided in the first drying tube 26 in the region of the manifold 24.
- the hot gas temperature Tl in the downcomer pipe 26 is higher than the hotgas temperature T2 in the riser pipe or subsequent second drying tube 27. This allows the less sensitive, humid tobacco material to be first heated at high temperature Tl dried off or pre-dried and the sensitive pre-dried tobacco material is then gently dry-finished at lower temperature T2. This positively influences the taste of the dried tobacco material.
- the flow velocity vi in the downpipe 26 can be selected to be low.
- the flow velocity vi may in particular be less than 10 m / s, for example less than 3 m / s.
- the second heating device 21 may possibly be dispensed with, with the result that the current dryer 10 has only one heating device 17.
- the hot gas temperature Tl in the downpipe or in the first drying tube 26 is lower than the hot gas temperature T2 in the riser and the subsequent second drying tube 27.
- a reduced process gas temperature in the first drying stage For example, be realized when the first heater 17 is deactivated and / or the process gas flowing through the first pipe circuit 11 is cooled down with steam and / or inert gas or fresh air.
- the high temperature range can be reversed with the low temperature range (T2> T1). Due to the combination of steam and fresh air / inert gas feeds 40, 41 it is also possible to use both drying stages. fen operate with different vapor contents. This will be explained in more detail below.
- a separator 28 for discharging dried tobacco material from the flow dryer 10 via a tobacco outlet 39 is arranged.
- the separator 28 may be a cyclone or other suitable separator.
- the flow dryer 10 advantageously has only one separator 28 for separating tobacco material from the hot gas stream. Preferably, the entire hot gas flow of the current dryer 10 flows through the separator 28.
- the arranged in the flow direction behind the separator 28 part 31 of the common transport pipe section 14 is not flowed through by tobacco material.
- the first pipe branch 24 is advantageously arranged between the tobacco inlet 23 and the separator 28 and / or the second pipe branch 25 advantageously after the separator 28.
- the entire hot gas flow 44 is branched into a hot gas stream 18 assigned to the first pipe circuit 11 and a hot gas stream 22 assigned to the second pipe circuit 12.
- One or more adjusting devices 29, 30 are preferably provided for changing the ratio of the gas volume flows flowing through the first pipe circuit 11 or through the second pipe circuit 12. This may be, for example, in each case one arranged in the first pipe circuit 11 and in the second pipe circuit 12 throttle valve 29 and 30, respectively. Instead, only one adjusting device can be provided in the pipe branch 25.
- the at least one adjusting device 29, 30 is preferably controllable or controllable via an electronic control unit 32. Alternatively or In addition, the speed of the fan 16, 20 via the electronic control unit 32 can be controlled or regulated.
- a flow sensor 33 or 34 in particular a mass or volume flow sensor, is provided in the part 31 of the common transport pipe section 14 not through which tobacco flows and the part 35 of the first transport pipe section not through which tobacco flows.
- at least two flow sensors 33, 34 are provided, which are arranged in different sections of the amount (common transport pipe section 31, first transport pipe section 35, second transport pipe section 19), the flow rates of the hot gas flows in the first pipe circuit 11 and the second pipe circuit 12 independently to be able to measure.
- the at least one adjusting device 29, 30 and / or the fans 16, 20 is or are preferably controllable or controllable on the basis of the flow rates measured by means of the flow sensors 33, 34 via the electronic control unit 32.
- the heating devices 17, 21 may also be controllable or regulatable via the electronic control unit 32, in particular on the basis of corresponding temperature measurement signals from temperature sensors (not shown). Furthermore, not shown valves for steam and / or inert gas / fresh air feeds 40, 41, in particular based on corresponding moisture and / or oxygen content measuring signals from sensors, not shown, for measuring the water and / or oxygen content of the process gases be controllable or controllable via the electronic control unit 32.
- the steam content of the process gas via steam feeds 40 can be influenced at various positions. Additional or old natively, an addition of fresh air and / or inert gas, for example nitrogen, via appropriate GasZu Installationen 41 done, for example, in the return line 31 and before the two drying tubes 26, 27. Furthermore, a pipe branch 42 may be provided for an exhaust duct 43, with the exhaust air laden with moisture (vapors) can be withdrawn from the flow dryer 10.
- the second pipe branch 25 is arranged downstream of the second fan 20 and the second heater 21 in a horizontal part of the pipe circuit 12.
- the flow sensor 33 may also be disposed downstream of the second fan 20 and the second heater 21 in the non-tobacco flow part 31 of the common transport pipe section 14.
- the steam and / or inert gas / fresh air feeds 40, 41 are partially arranged differently here.
- the embodiments according to FIGS. 1, 2 and 3 may in particular relate to the arrangement of the second manifold 25, the flow sensor 33 and / or the
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Manufacture Of Tobacco Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012217208.4A DE102012217208A1 (de) | 2012-09-24 | 2012-09-24 | Stromtrockner und Stromtrocknungsverfahren zum Trocknen eines Tabakmaterials |
| PCT/EP2013/002649 WO2014044358A1 (de) | 2012-09-24 | 2013-09-04 | Stromtrockner und stromtrocknungsverfahren zum trocknen eines tabakmaterials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2897476A1 true EP2897476A1 (de) | 2015-07-29 |
Family
ID=49117814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13758757.2A Withdrawn EP2897476A1 (de) | 2012-09-24 | 2013-09-04 | Stromtrockner und stromtrocknungsverfahren zum trocknen eines tabakmaterials |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2897476A1 (de) |
| CN (1) | CN104640463A (de) |
| DE (1) | DE102012217208A1 (de) |
| WO (1) | WO2014044358A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9518779B2 (en) | 2014-04-04 | 2016-12-13 | Garbuio S.P.A. | Drying plant for particulate materials |
| DE102014223625A1 (de) * | 2014-11-19 | 2016-05-19 | Hauni Maschinenbau Ag | Verfahren und Stromtrockner zum Trocknen eines Tabakmaterials |
| HUE046433T2 (hu) * | 2015-05-08 | 2020-02-28 | Comas Costruzioni Macch Speciali S P A | Javított eljárás dohány expandálására és szárítására és berendezés annak végrehajtására |
| CN110608584A (zh) * | 2018-06-14 | 2019-12-24 | 江苏搏斯威化工设备工程有限公司 | 气流干燥机 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1095337A (de) * | 1900-01-01 | |||
| GB1058185A (en) * | 1962-08-23 | 1967-02-08 | Kurt Koerber | Method and apparatus for drying fibrous or foliate material |
| DE4127374A1 (de) | 1991-08-19 | 1993-02-25 | Hauni Werke Koerber & Co Kg | Vorrichtung zum ueberfuehren von tabakteilen in einen stromtrockner |
| DE4221573A1 (de) | 1992-07-01 | 1994-01-05 | Hauni Werke Koerber & Co Kg | Verfahren und Anordnung zum Trocknen von Tabak |
| DE10046123A1 (de) * | 2000-09-15 | 2002-03-28 | Reemtsma H F & Ph | Verfahren und Vorrichtung zum Behandeln von Tabak |
| DE102004017596A1 (de) * | 2004-04-07 | 2005-11-03 | Hauni Primary Gmbh | Vorrichtung zum Konditionieren eines Tabakprodukts |
| DE102005015781A1 (de) * | 2005-04-01 | 2006-10-05 | Hauni Maschinenbau Ag | Verfahren und Vorrichtung zum Trocknen eines faserförmigen Gutes |
| DE102005062725B3 (de) * | 2005-12-22 | 2007-07-12 | Hauni Maschinenbau Ag | Stromtrockner zum Trocknen eines faserförmigen Produkts |
| DE102009028913A1 (de) * | 2009-08-26 | 2011-03-31 | Jt International S.A. | Vorrichtung und Verfahren zum Behandeln von Tabak |
| CN202166290U (zh) * | 2011-05-27 | 2012-03-14 | 广州秘理普植物技术开发有限公司 | 一种气流式植物干燥机 |
-
2012
- 2012-09-24 DE DE102012217208.4A patent/DE102012217208A1/de not_active Ceased
-
2013
- 2013-09-04 WO PCT/EP2013/002649 patent/WO2014044358A1/de not_active Ceased
- 2013-09-04 CN CN201380049653.2A patent/CN104640463A/zh active Pending
- 2013-09-04 EP EP13758757.2A patent/EP2897476A1/de not_active Withdrawn
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2014044358A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012217208A1 (de) | 2014-03-27 |
| WO2014044358A1 (de) | 2014-03-27 |
| CN104640463A (zh) | 2015-05-20 |
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Inventor name: FUNKE, PETER Inventor name: ZIELKE, DIETMAR |
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| DAX | Request for extension of the european patent (deleted) | ||
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HAUNI MASCHINENBAU GMBH |
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