Multi-stage roller cut tobacco dryer
By designing a multi-stage drum dryer, using multiple sequentially connected drum components and heat exchange chambers, the temperature control during the tobacco drying process is achieved, and the problems of excessive temperature, excessive drying and high energy consumption are solved, and energy consumption is reduced.
Patent Information
- Application Number
- CN202510427253.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2025-06-13
AI Technical Summary
When drying tobacco, existing drum dryers need to increase the temperature and residence time, resulting in excessive temperature, excessive drying and high energy consumption.
A multi-stage drum wire dryer is designed, employing a plurality of sequentially connected drum assemblies, each drum assembly can be individually controlled, combined with multiple heat exchange chambers to achieve separate control of the operating temperature of each drum assembly.
The residence time of the tobacco wire in each drum assembly is reduced, and the tobacco wire temperature is avoided and excessive drying is reduced, while the energy consumption is reduced without affecting the drying effect.
Smart Images
Figure CN120130672A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of tobacco processing equipment, and particularly relates to a multi-stage drum tobacco dryer. Background Art
[0002] In the process of tobacco processing, in order to remove the moisture in the tobacco, a drum tobacco dryer is used to dry the wet tobacco. Most of the currently used drum tobacco dryers adopt a single drum system. In this way, in order to meet the drying requirements during the tobacco drying process, it is necessary to increase the drying temperature and the residence time of the tobacco, which will cause defects such as too high tobacco temperature, over-drying and high energy consumption. The above problems need to be solved urgently. Summary of the Invention
[0003] The present invention discloses a multi-stage drum tobacco dryer, aiming to solve the technical problems existing in the prior art.
[0004] The present invention adopts the following technical solutions:
[0005] The present invention provides a multi-stage drum tobacco dryer, which includes a cylinder shell and at least two drum assemblies; the drum assemblies are sequentially communicated with each other and are rotatably arranged in the cylinder shell. There is a gap between the inlet of the first drum assembly and the end of the cylinder shell to form a feed chamber, and there is a gap between the outlet of the last drum assembly and the tail of the cylinder shell to form a discharge chamber; there is a gap between each drum assembly and the side wall of the cylinder shell to form a plurality of heat exchange chambers; each heat exchange chamber is respectively communicated with an external steam system; an air inlet and a feed port communicating with the feed chamber, and an air outlet and a discharge port communicating with the discharge chamber are provided on the cylinder shell.
[0006] In a multi-stage drum tobacco dryer of the present invention, the drum assemblies are coaxially arranged, and the rotation axis is inclined downward from the inlet to the outlet direction, and the inclination angle is 1.5° - 2°.
[0007] In a multi-stage drum tobacco dryer of the present invention, the drum assembly includes a drum, a power assembly and a plurality of scraper plates; the plurality of scraper plates are arranged at intervals along the circumferential direction of the drum inside the drum; the power assembly is used to drive the drum to rotate; the drum has an inlet and an outlet.
[0008] In a multi-stage drum tobacco dryer of the present invention, flanges are provided at the edges of the inlet side and the outlet side of the drum. The flanges are made of a material that expands when heated, and are in clearance fit with the inner wall of the cylinder shell in the expanded state. In the non-expanded state, a flow channel for discharging condensed water is formed between the flanges and the inner wall of the cylinder shell, and a drain port is provided at the lowest position in the heat exchange chamber.
[0009] In a multi-stage drum tobacco dryer of the present invention, the scraper plates are coplanar with the plane formed by the radial and axial directions of the drum.
[0010] In a multi-stage drum silk drying machine of the present invention, the shavings include a long shavings and a short shavings; the long shavings and the short shavings have the same axial length, and the long shavings are longer in radial direction than the short shavings; the long shavings and the short shavings are alternately arranged along the inner wall of the drum.
[0011] In a multi-stage drum silk drying machine of the present invention, the drum and the copying plate are both metal plates.
[0012] In a multi-stage drum wire drying machine of the present invention, the inlet pipes and outlet pipes of adjacent drums are nested, and a heat expansion member is arranged between them; the heat expansion member can expand under heat to abut between the inlet pipe and the outlet pipe to seal the two.
[0013] In a multi-stage drum silk drying machine of the present invention, the inlet pipe and the outlet pipe are made of elastic material.
[0014] In a multi-stage drum wire drying machine of the present invention, the heat expansion component includes at least one rubber ring sheet; the rubber ring sheet is circumferentially arranged along the inlet pipe or the outlet pipe, and the edges on both sides are sealed and connected to the inlet pipe or the outlet pipe, forming an annular accommodating space inside; the accommodating space is filled with heat expansion gas.
[0015] In a multi-stage drum wire drying machine of the present invention, the heat expansion member comprises a plurality of rubber ring sheets; the plurality of rubber ring sheets are arranged at intervals along the axial direction of the inlet pipe or the outlet pipe, and are alternately arranged on the inlet pipe and the outlet pipe.
[0016] In a multi-stage drum wire drying machine of the present invention, the rubber ring sheets are respectively arranged on the inlet connecting pipe and the outlet connecting pipe; the rubber ring sheets arranged on the inlet connecting pipe and the outlet connecting pipe overlap in the axial direction, and the opposite surfaces have a plurality of annular protrusions; adjacent annular protrusions form annular recesses; when the rubber ring sheet is in an expanded state, the annular recesses can accommodate the annular protrusions.
[0017] The technical solution adopted by the present invention can achieve the following beneficial effects:
[0018] The present invention mainly provides a multi-stage roller tobacco drying machine. Based on the arrangement of a plurality of roller assemblies connected in sequence, when the tobacco is drying, the tobacco passes through each roller assembly in sequence, and each roller assembly can be controlled individually. On the one hand, the residence time of the tobacco in each roller assembly can be reduced to avoid excessive temperature and over-drying of the tobacco. On the other hand, by cooperating with the heat exchange chambers arranged corresponding to each roller assembly, the operating temperature of each roller assembly can be individually controlled, which can reduce energy consumption without affecting the drying effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments, which form a part of the present invention. The schematic embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:
[0020] Figure 1 is a schematic structural diagram of a multi-stage drum tobacco dryer of the present invention;
[0021] Figure 2 is a schematic internal structural diagram of a multi-stage drum tobacco dryer of the present invention;
[0022] Figure 3 is a schematic structural diagram of the drum of the present invention;
[0023] Figure 4 is a schematic structural diagram of the connection state of the drum of the present invention;
[0024] Figure 5 is of the present invention Figure 4 A-A direction sectional structural diagram;
[0025] Figure 6 is of the present invention Figure 5 One of the partial enlarged structural diagrams at position B in;
[0026] Figure 7 is of the present invention Figure 5 Another partial enlarged structural diagram at position B in;
[0027] Figure 8 is a schematic structural diagram of the rubber ring piece of the present invention.
[0028] Explanation of reference numerals:
[0029] 1. Cylinder shell; 11. Feed chamber; 12. Discharge chamber; 13. Heat exchange chamber; 14. Air inlet; 15. Feed port; 16. Air outlet; 17. Discharge port; 2. Drum assembly; 21. Drum; 211. Inlet connection pipe; 212. Outlet connection pipe; 213. Flange; 22. Scraper; 221. Long scraper; 222. Short scraper; 3. Thermal expansion member; 31. Rubber ring piece; 311. Annular convex portion; 312. Annular concave portion; 32. Accommodating space. Detailed embodiments
[0030] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in combination with the specific embodiments and corresponding drawings of the present invention. In the description of the present invention, it should be noted that the term "or" is generally used in the sense of including "and / or", unless otherwise clearly specified in the content.
[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a magnetic connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.
[0032] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.
[0033] To solve the problems existing in the prior art, an embodiment of the present application provides a multi-stage drum tobacco dryer.
[0034] As Figure 1 and Figure 2 shown, a multi-stage drum tobacco dryer includes a shell 1 and at least two drum components 2; the drum components 2 are sequentially communicated with each other and rotatably arranged in the shell 1. There is a gap between the inlet of the first drum component 2 and the end of the shell 1 to form a feed chamber 11, and there is a gap between the outlet of the last drum component 2 and the tail of the shell 1 to form a discharge chamber 12; there is a gap between each drum component 2 and the side wall of the shell 1 to form a plurality of heat exchange chambers 13; each heat exchange chamber 13 is respectively communicated with an external steam system; an air inlet 14 and a feed port 15 communicating with the feed chamber 11, and an air outlet 16 and a discharge port 17 communicating with the discharge chamber 12 are provided on the shell 1; preferably, the sizes of the drum components 2 can be the same or different.
[0035] In the multi-stage drum tobacco dryer of the present invention, based on the setting of a plurality of sequentially communicated drum components 2, during the tobacco drying operation, the tobacco passes through each drum component 2 in sequence, and each drum component 2 can be controlled independently. On the one hand, it can reduce the residence time of the tobacco in each drum component 2 and avoid the tobacco temperature being too high and over-drying. On the other hand, in cooperation with the heat exchange chambers 13 corresponding to each drum component 2, the operating temperature of each drum component 2 can be controlled independently, and the energy consumption can be reduced without affecting the drying effect.
[0036] In some preferred embodiments, the drum assemblies 2 are coaxially arranged, and the rotation axis is inclined downward from the inlet to the outlet direction, with an inclination angle of 1.5° to 2°; based on this, it can ensure the smooth transportation of cut tobacco, and cooperate with the control of the rotation speed of the drum assemblies 2 to achieve the maximum adjustment range of the transportation speed; if the angle is too small, it will cause difficulties in transporting cut tobacco, and if the angle is too large, the cut tobacco will be transported too fast and the drying will be incomplete.
[0037] In some preferred embodiments, as Figure 1 and Figure 2 shown, the drum assembly 2 includes a drum 21, a power assembly (not shown), and a plurality of lifters 22; the plurality of lifters 22 are arranged at intervals along the circumferential direction of the drum 21 inside the drum 21; the power assembly is used to drive the drum 21 to rotate; the drum 21 has an inlet and an outlet; wherein, the plurality of drums 21 are connected end to end to form a connected conveying channel, and the cut tobacco enters from the inlet of the first drum 21 and is output from the outlet of the last drum 21.
[0038] Preferably, the power assembly includes a bracket, a supporting wheel, a gear transmission assembly, and a motor. The specific connection structure can refer to the existing drum dryer and will not be elaborated here.
[0039] Preferably, as Figure 4 shown, flanges 213 are provided at the edges of the inlet side and the outlet side of the drum 21, such as ring-shaped flanges. The flanges 213 are made of a heat-expandable material, and are in clearance fit with the inner wall of the cylinder shell 1 in the expanded state, and are sealed by forming a water film with condensate. In the non-expanded state, a flow channel for discharging condensate is formed between the flanges 213 and the inner wall of the cylinder shell 1, and a drain port is provided at the lowest position in the heat exchange chamber 13; based on this, during the cut tobacco drying operation, it is ensured that the heat exchange chambers 13 are relatively independent of each other, and thus different temperatures of the heat exchange chambers 13 can be achieved. Moreover, in the non-operation condition, it is convenient to drain the condensate water, and there is no need to provide a drain port in each heat exchange chamber 13, and the drainage is more thorough, that is, only a small amount of residue may exist in the last heat exchange chamber 13.
[0040] Specifically, the heat-expandable material can be polyethylene (PE), polypropylene (PP), or polycarbonate (PC). Preferably, the heat-expandable material is a hydrophilic plastic material, such as hydrophilic PMMA, to increase the hydrophilicity, so that during the cut tobacco drying operation, a better water film seal can be formed. Further preferably, a hydrophilic coating, such as a hydrophilic PMMA layer, is coated on the inner surface of the drum 21 corresponding to the flange 213.
[0041] In some preferred embodiments, as Figure 1 and Figure 3 shown, the lifters 22 are coplanar with the plane formed by the radial and axial directions of the drum 21; based on this setting method, during the material turning, the turning is more uniform, which is beneficial to the drying operation, and the forces on each lifter 22 are the same, which can extend the service life.
[0042] Preferably, the copying plate 22 includes a long copying plate 221 and a short copying plate 222; the long copying plate 221 and the short copying plate 222 have the same axial length, and the length of the long copying plate 221 in the radial direction is greater than that of the short copying plate 222; the long copying plate 221 and the short copying plate 222 are alternately arranged along the inner wall of the drum 21; based on this, on the one hand, the heat conduction area is increased, which helps to heat the cut tobacco, and on the other hand, the cut tobacco is turned by the cooperation of the large-sized long copying plate 221 and the small-sized short copying plate 222, and the cut tobacco has better dispersibility during turning, and thus the uniformity of turning is better, which can improve the uniformity of the humidity of the cut tobacco.
[0043] In some preferred embodiments, both the drum 21 and the copying plate 22 are metal plates; preferably, high thermal conductivity materials such as copper and aluminum are used to improve the heat conduction with steam and enhance the heating effect on the cut tobacco.
[0044] In some preferred embodiments, as Figure 5 and Figure 6 shown, the inlet connecting pipe 211 and the outlet connecting pipe 212 of adjacent drums 21 are sleeved, and a thermal expansion member 3 is arranged therebetween; the thermal expansion member 3 can expand when heated to abut between the inlet connecting pipe 211 and the outlet connecting pipe 212 to seal the two; based on the setting of the thermal expansion member 3, the installation accuracy of adjacent drums 21 during installation can be reduced, and it can be ensured that the heating steam enters the drum 21 during operation, affecting the cut tobacco drying effect. The thermal expansion member 3 can be made of metal or plastic or other structures that can achieve thermal expansion.
[0045] Preferably, the inlet connecting pipe 211 and the outlet connecting pipe 212 are made of elastic materials; thus, the increased wear on the thermal expansion member 3 caused by the uneven interval between the inlet connecting pipe 211 and the outlet connecting pipe 212 can be reduced; that is, based on the elastic change of the inlet connecting pipe 211 and the outlet connecting pipe 212, deformation can occur at the position where the thermal expansion member 3 is severely squeezed, thereby reducing the frictional damage to the thermal expansion member 3. Preferably, the inlet connecting pipe 211 and the outlet connecting pipe 212 are metal shrapnel.
[0046] In some preferred embodiments, the thermal expansion member 3 includes at least one rubber ring piece 31; the rubber ring piece 31 is circumferentially arranged along the inlet connecting pipe 211 or the outlet connecting pipe 212, and both side edges are hermetically connected to the inlet connecting pipe 211 or the outlet connecting pipe 212, and an annular accommodation space 32 is formed inside; the accommodation space 32 is filled with a thermal expansion gas; based on the method of using the rubber ring piece 31 in cooperation with the accommodation space 32 filled with the thermal expansion gas, on the one hand, the volume change of the gas is greater when heated, and thus, a larger installation space can be provided, further reducing the requirement for the installation accuracy of adjacent drums 21; on the other hand, the elasticity of the rubber ring piece 31 becomes lower at high temperatures, and the hindering effect on the expansion of the gas filled inside is reduced, which is also beneficial to the thermal expansion of the gas.
[0047] Preferably, as Figure 7 shown, the thermal expansion member 3 includes a plurality of rubber ring pieces 31; the plurality of rubber ring pieces 31 are axially spaced along the inlet connecting pipe 211 or the outlet connecting pipe 212, and are alternately arranged on the inlet connecting pipe 211 and the outlet connecting pipe 212; that is, adjacent rubber ring pieces 31 are one arranged on the inlet connecting pipe 211 and the other is arranged on the outlet connecting pipe 212, and are alternately arranged in this way to form a form similar to a labyrinth seal, which can further reduce the risk of external steam entering the drum 21.
[0048] Preferably, as Figure 8 shown, rubber ring pieces 31 are respectively arranged on the inlet connecting pipe 211 and the outlet connecting pipe 212; the rubber ring pieces 31 arranged on the inlet connecting pipe 211 and the outlet connecting pipe 212 overlap axially, and the opposite surfaces have a plurality of annular convex portions 311; adjacent annular convex portions 311 form an annular concave portion 312; when the rubber ring piece 31 is in an expanded state, the annular concave portion 312 can accommodate the annular convex portion 311; thus, the allowable dimensional deviation of adjacent drums 21 is further increased, and a good sealing effect is achieved; especially when cooperating with the inlet connecting pipe 211 and the outlet connecting pipe 212 made of rubber material, during the drying operation, due to the gas expansion driving the rubber ring piece 31 to be in a taut state, and cooperating with the elastic deformability of the inlet connecting pipe 211 and the outlet connecting pipe 212, the friction between the rubber ring pieces 31 can be reduced and the service life can be improved.
[0049] The following takes the setting of three drum assemblies 2 as an example to illustrate the effect:
[0050] Device 1: The operating temperatures of the three drum assemblies 2 decrease sequentially along the tobacco cut-flow direction. For example, the operating temperature of the first drum assembly 2 is 120 °C, the operating temperature of the middle drum assembly 2 is 110 °C, and the operating temperature of the drum assembly 2 at the tail end is 100 °C;
[0051] Device 2: A cut tobacco dryer with a single drum, whose drum length is the same as that of the drum assembly 2 and the diameter is also the same, and its operating temperature is 120 °C; other conditions are the same
[0052] Device 3: A cut tobacco dryer with a single drum, whose drum length is the same as that of the drum assembly 2 and the diameter is also the same, and its operating temperature is 110 °C; other conditions are the same
[0053] Measure the moisture content, air temperature and cut tobacco temperature at the outlet, and the results are as follows:
[0054] The moisture content of the cut tobacco at the outlet of Device 1 is 12.94%; the outlet air temperature is 84.99; the cut tobacco temperature at the outlet is 105.16;
[0055] The moisture content of the cut tobacco at the outlet of Device 2 is 12.74%; the outlet air temperature is 95.92; the cut tobacco temperature at the outlet is 121.10;
[0056] The moisture content of the cut tobacco at the outlet of Equipment 3 is 13.2%; the outlet air temperature is 88.33; the outlet cut tobacco temperature is 111.37.
[0057] It can be seen from the above result data that the multi-stage drum can complete the drying process at a lower cut tobacco outlet temperature, further proving its high efficiency in heat energy utilization.
[0058] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims, and all of them belong to the protection scope of the present invention.
Claims
1. A multi-stage drum wire drying machine, characterized in that: It comprises a drum shell (1) and at least two drum assemblies (2); The roller assemblies (2) are connected to each other in sequence and are rotatably arranged in the cylinder shell (1), wherein an inlet of the first roller assembly (2) is spaced from the end of the cylinder shell (1) to form a feeding chamber (11), and an outlet of the last roller assembly (2) is spaced from the tail of the cylinder shell (1) to form a discharging chamber (12); There is a gap between each of the drum assemblies (2) and the side wall of the drum shell (1), forming a plurality of heat exchange chambers (13); each of the heat exchange chambers (13) is connected to an external steam system; The cylinder shell (1) is provided with an air inlet (14) and a feed port (15) connected to the feed chamber (11), and an air outlet (16) and a discharge port (17) connected to the discharge chamber (12).
2. A multi-stage drum wire drying machine according to claim 1, characterized in that: The roller assemblies (2) are coaxially arranged, and the rotation axis is tilted downward from the inlet to the outlet, with an inclination angle of 1.5° to 2°.
3. The multi-stage drum wire drying machine according to claim 1, characterized in that: The roller assembly (2) comprises a roller (21), a power assembly and a plurality of lifting plates (22); A plurality of the copying plates (22) are arranged in the drum (21) at intervals along the circumference of the drum (21); The power assembly is used to drive the roller (21) to rotate; The drum (21) has an inlet and an outlet.
4. The multi-stage drum wire drying machine according to claim 3, characterized in that: The surfaces formed by the radial direction and the axial direction of the lifting plate (22) and the roller (21) are coplanar.
5. The multi-stage drum wire drying machine according to claim 3, characterized in that: The roller (21) and the copy board (22) are both metal plates.
6. The multi-stage drum wire drying machine according to claim 3, characterized in that: The inlet pipe (211) and the outlet pipe (212) of the adjacent rollers (21) are fitted together, and a heat expansion member (3) is arranged between them; The heat expansion member (3) can expand when heated so as to abut between the inlet pipe (211) and the outlet pipe (212) to seal the two.
7. The multi-stage drum wire drying machine according to claim 6, characterized in that: The inlet pipe (211) and the outlet pipe (212) are made of elastic material.
8. The multi-stage drum wire drying machine according to claim 6, characterized in that: The heat expansion member (3) comprises at least one rubber ring piece (31); The rubber ring sheet (31) is arranged along the circumference of the inlet pipe (211) or the outlet pipe (212), and the edges on both sides are sealed and connected to the inlet pipe (211) or the outlet pipe (212), forming an annular accommodation space (32) inside; The accommodating space (32) is filled with thermal expansion gas.
9. The multi-stage drum wire drying machine according to claim 8, characterized in that: The heat expansion member (3) comprises a plurality of rubber ring pieces (31); A plurality of the rubber ring sheets (31) are arranged at intervals along the axial direction of the inlet pipe (211) or the outlet pipe (212), and are alternately arranged on the inlet pipe (211) and the outlet pipe (212).
10. The multi-stage drum wire drying machine according to claim 8, characterized in that: The inlet pipe (211) and the outlet pipe (212) are respectively provided with the rubber ring sheet (31); The rubber ring sheets (31) arranged on the inlet pipe (211) and the outlet pipe (212) overlap in the axial direction, and the opposite surfaces have a plurality of annular protrusions (311); adjacent annular protrusions (311) form annular recesses (312); When the rubber ring sheet (31) is in an expanded state, the annular recess (312) can accommodate the annular protrusion (311).