CN113115968A - Cut tobacco drying tower, tower type airflow cut tobacco drying machine, cut tobacco making system and tobacco production system - Google Patents

Abstract

The disclosure relates to the technical field of cigarette cut-tobacco making equipment, in particular to a cut-tobacco drying tower, a tower type airflow cut-tobacco drying machine, a cut-tobacco making system and a tobacco production system. The cut-tobacco drying tower comprises a tower body, wherein a feed inlet and a discharge outlet are arranged on the tower body, and the side wall of the tower body adjacent to the discharge outlet gradually inclines outwards along the direction of the materials flowing from the feed inlet to the discharge outlet. Based on this, can effectively promote cut tobacco moisture distribution uniformity of cut tobacco tower discharge gate.

Description

Cut tobacco drying tower, tower type airflow cut tobacco drying machine, cut tobacco making system and tobacco production system

Technical Field

The disclosure relates to the technical field of cigarette cut-tobacco making equipment, in particular to a cut-tobacco drying tower, a tower type airflow cut-tobacco drying machine, a cut-tobacco making system and a tobacco production system.

Background

The tower-type airflow cut tobacco drying machine is a device for drying cut tobacco in a cut tobacco drying tower by utilizing high-temperature airflow, has the advantages of short drying time, high thermal efficiency, good drying effect and the like, and particularly has great advantages in the aspect of processing a large batch of cut tobacco.

However, the practice finds that the tobacco shreds have the problem of uneven moisture distribution when flowing out of the discharge hole of the tobacco drying tower, and the quality of the finished tobacco shreds is influenced.

Disclosure of Invention

One technical problem to be solved by the present disclosure is: the uniformity of the moisture distribution of the cut tobacco at the discharge port of the cut tobacco drying tower is improved.

In order to solve the technical problem, the first aspect of the present disclosure provides a cut-tobacco drying tower, which includes a tower body, wherein the tower body is provided with a feed inlet and a discharge outlet, and along the direction of the material flowing from the feed inlet to the discharge outlet, the side wall of the tower body adjacent to the discharge outlet gradually inclines outwards.

In some embodiments, the tower body comprises a first tower section and a second tower section, the feeding port and the discharging port are respectively arranged on the first tower section and the second tower section, and the side wall of the side, provided with the discharging port, of the second tower section inclines outwards.

In some embodiments, a sidewall of the second tower section opposite the spout extends vertically.

In some embodiments, the tower body further comprises a third tower section connected between the first tower section and the second tower section, the third tower section having a cross-sectional area that gradually increases in a direction from the first tower section to the second tower section.

In some embodiments, the side wall of the first tower segment extends vertically.

In some embodiments, the feed port is located below the discharge port.

In some embodiments, the feed inlet and the discharge outlet are disposed on opposite sides of the tower body.

A second aspect of the present disclosure provides a tower airflow cut-tobacco dryer, which includes a cut-tobacco drying tower of an embodiment of the present disclosure.

A third aspect of the present disclosure provides a cut-tobacco making system, which includes a tower-type airflow cut-tobacco dryer of the embodiments of the present disclosure.

A fourth aspect of the present disclosure provides a tobacco production system comprising a shred-making system of embodiments of the present disclosure.

This disclosed embodiment improves through the structure to cut-tobacco drying tower, changes the lateral wall that adjoins with the discharge gate of cut-tobacco drying tower by vertical to lean out, can effectively improve cut-tobacco drying tower discharge gate pipe tobacco velocity of flow distribution homogeneity, and then can effectively promote cut-tobacco drying tower discharge gate pipe tobacco moisture distribution homogeneity.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic view of a tower-type air-flow cut-tobacco dryer in the related art.

Fig. 2 shows a structure of a related art cut-tobacco drying tower.

Fig. 3 is a top view of fig. 2.

Figure 4 illustrates the structure of a tobacco drying tower in an embodiment of the present disclosure.

Fig. 5 is a top view of fig. 4.

FIG. 6 is a cloud of the discharge velocity profile of the tobacco tower shown in FIG. 2.

FIG. 7 is a cloud of discharge velocity profiles of the tobacco-drying tower shown in FIG. 4.

Description of reference numerals:

10. a tower type airflow cut tobacco dryer;

1. a material homogenizer; 2. vibrating a groove; 3. an expansion device; 4. a cut tobacco drying tower; 5. a gas-material separator; 6. a centrifugal fan; 7. an incinerator; 8. a screw conveyor; 91. feeding airlock; 92. discharging airlock;

41. a feed inlet; 42. a discharge port; 43. a first tower section; 44. a second tower section; 45. a third tower section; 46. a tower body.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without any inventive step, are intended to be within the scope of the present disclosure.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are presented only for the convenience of describing and simplifying the disclosure, and in the absence of a contrary indication, these directional terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present disclosure.

In addition, technical features involved in different embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other.

In a tobacco production system, a Tower type air flow tobacco Dryer (CTD) is an important component of a tobacco making system, and the air flow tobacco Dryer rapidly dries moisture in tobacco shreds by utilizing high-temperature convection gas to enable the tobacco shreds to reach required moisture content, remove miscellaneous gas of the tobacco shreds, increase filling values of the tobacco shreds and improve the quality of the tobacco shreds.

Fig. 1 shows a structure of a tower type air-flow cut-tobacco dryer in the related art. The hollow arrows in fig. 1 indicate the flow direction of the cut tobacco; the dotted arrow indicates the direction of water vapor injection; the solid arrows indicate the flow direction of the process gas.

As shown in fig. 1, the tower-type airflow cut-tobacco dryer 10 includes a material homogenizer 1, a vibration tank 2, an expansion device 3, a cut-tobacco drying tower 4 (also called a drying tower), a gas-material separator 5, a centrifugal fan 6, an incinerator 7, a screw conveyor 8, a feeding air lock 91 and a discharging air lock 92.

Wherein, the material homogenizer 1, the vibration groove 2, the expansion device 3, the cut tobacco drying tower 4 and the gas-material separator 5 are communicated in turn along the material flowing direction. The feed airlock 91 is disposed between the vibrating trough 2 and the expansion device 3. The discharging air lock 92 is arranged at the material outlet of the gas-material separator 5. The airflow outlet of the gas-material separator 5 is communicated with an incinerator 7 through a centrifugal fan 6. The incinerator 7 is in communication with the cut-tobacco drying tower 4 and the expansion device 3. The screw conveyor 8 is arranged at the lower part of the cut-tobacco drying tower 4.

The material homogenizer 1 is used for opening the material. The vibration groove 2 is a high-frequency vibration groove and is used for further loosening the materials. The expansion device 3 uses the injected high-pressure steam to make the tobacco shred absorb moisture and expand. The cut tobacco drying tower 4 dehydrates and dries the expanded cut tobacco by using high-temperature process gas. The gas material separator 5 separates the dried tobacco shreds from the gas. The centrifugal fan 6 sends the gas separated by the gas-material separator 5 to the incinerator 7 to recycle part of the hot gas discharged by the centrifugal fan 6. The incinerator 7 incinerates and heats the gas to provide heat for the entire system. The process gas flowing out of the incinerator 7 is divided into two paths, one path enters the expansion device 3 (as shown by the first solid arrow on the left side in fig. 1) and is premixed with the cut tobacco sent from the vibration groove 2 so as to improve the conveying capacity of the expansion device 3 on the cut tobacco, and the other path enters the cut tobacco drying tower 4 (as shown by the second solid arrow on the left side in fig. 1) and is used for conveying and drying the cut tobacco entering the cut tobacco drying tower 4 from the expansion device 3.

During operation, as shown by hollow arrows in figure 1, the cut tobacco is loosened by the material homogenizer 1, enters the vibration tank 2, is further loosened by the vibration tank 2, enters the expansion device 3 through the feeding air lock 91, and in the expansion device 3, part of process gas mixed steam (shown by dotted arrows in figure 1) is sprayed by the venturi tube to generate local negative pressure, is mixed with the cut tobacco, fully absorbs moisture and expands in the expansion device 3, and is pushed to the cut tobacco drying tower 4. Then the cut tobacco is conveyed in the cut tobacco drying tower 4 by high-temperature airflow, and is quickly dehydrated, dried and shaped in the conveying process, and impurities such as stones and the like mixed in the cut tobacco are discharged by the screw conveyor 8. The mixture of the cut tobacco and the gas flowing out of the cut tobacco drying tower 4 flows to the gas-material separator 5, and the gas-material separator 5 separates the cut tobacco and the gas. The separated tobacco shreds are discharged by a discharge air lock 92 and flow to the next process of the tobacco shred manufacturing system. Part of the separated airflow flows to the incinerator 7 through the centrifugal fan 6, is reheated and continues to participate in circulation.

It can be seen that the tobacco dryer tower 4 is an important component of the tower-type airflow tobacco dryer 10. The general structure of the dryer tower 4 is shown in figures 2-5. As shown in fig. 2-5, the cut-tobacco drying tower 4 comprises a tower body 46, and the tower body 46 is provided with a feeding hole 41 and a discharging hole 42. The feed inlet 41 communicates with the expansion device 3 to enable communication between the dryer column 4 and the expansion device 3 such that material can enter the interior of the dryer column 4 via the expansion device 3. The discharge port 42 is substantially rectangular and communicates with the gas-material separator 5 to communicate the cut-tobacco drying tower 4 with the gas-material separator 5, so that the material can flow from the cut-tobacco drying tower 4 to the gas-material separator 5. Meanwhile, the tower body 46 is further provided with an air inlet (not shown), which is located at the opposite side of the feed port 41 and is communicated with the incinerator 7, so as to communicate the cut-tobacco drying tower 4 with the incinerator 7, and the process gas flowing out of the incinerator 7 can flow into the cut-tobacco drying tower 4 through the air inlet.

Specifically, as shown in fig. 2-5, the tower body 46 includes a first tower section 43 and a second tower section 44. The inlet 41 and the outlet 42 are arranged on a first column section 43 and a second column section 44, respectively. The air inlet is arranged on the first tower section 43. And the tower body 46 further comprises a third tower section 45. The third tower segment 45 is connected between the first tower segment 43 and the second tower segment 44. Wherein the first tower segment 43 is substantially cylindrical with vertically extending sidewalls. The first tower segment 43 and the second tower segment 44 have unequal cross-sectional areas. The third tower segment 45 now forms a transition between the first tower segment 43 and the second tower segment 44, which differ in cross-sectional area. For example, in fig. 2 and 4, the cross-sectional area of the first tower segment 43 is smaller than that of the second tower segment 44, and in this case, the cross-sectional area of the third tower segment 45 is gradually increased in a direction from the first tower segment 43 to the second tower segment 44, and is substantially tapered.

As shown in FIG. 1, the dryer towers 4 are generally vertically arranged, i.e., the longitudinal central axes of the dryer towers 4 generally extend in an up-down direction. As can be seen from fig. 1, 2 and 4, the inlet 41, the outlet 42 and the air inlet of the cut tobacco drying tower 4 are located on the side wall of the tower body 46. The feeding port 41 is located below the discharging port 42, the air inlet is located below the feeding port 41, at this time, the first tower section 43 is located below the second tower section 44, and the first tower section 43, the third tower section 45 and the second tower section 44 are sequentially arranged along a direction from bottom to top. Like this, the process gas that flows into in the tower body 46 by burning furnace 7 flows from bottom to top, and in this process, the process gas can meet and mix with the inside pipe tobacco that gets into tower body 46 by expansion device 3, drives the pipe tobacco and flows from bottom to top, realizes the suspension transport to the pipe tobacco, and simultaneously, moisture in the pipe tobacco is taken away to high temperature process gas, realizes the rapid draing to the pipe tobacco, and the pipe tobacco after the drying flows from discharge gate 42 on upper portion.

In some embodiments, a perforated plate air deflector (not shown) and an annular air homogenizer (not shown) are further disposed inside the tower 46 below the feed port 41 to equalize the wind speed and form uniform wind.

Although the tower-type airflow cut tobacco dryer 10 can achieve a good drying and shaping effect, in practical use, the problem that the moisture of the cut tobacco at the outlet of the cut tobacco drying tower 4 is uneven is found, wherein the moisture of the cut tobacco at the outlet is uneven in the vertical direction and the left and right directions on the cross section of the discharge port 42. The moisture fluctuation condition of the cut tobacco outlet of a batch is tracked, and the moisture standard deviation reaches 0.2751.

Although some measures are taken in the related art for solving the problem of uneven moisture distribution of the tobacco shreds at the outlet, most of the measures start from the aspects of changing the air inlet layout of the process air and the like, and the structure of the tobacco drying tower 4 is not improved.

The inventor has found that the structure of the cut tobacco drying tower 4 is also an important reason for influencing the uniformity of the moisture distribution of the cut tobacco at the outlet.

As shown in fig. 2, in the related art, the discharge hole 42 protrudes outward from the side wall of the second tower section 44, the side wall of the second tower section 44 adjacent to the discharge hole 42 extends vertically and is a straight wall, and at this time, a straight wall connection mode is adopted between the discharge hole 42 and the side wall of the second tower section 44. Research finds that in the process that the cut tobacco flows to the discharge port 42, the cut tobacco impacts the top of the tower at a high speed to turn back, and in the process, the flow velocity of the cut tobacco is higher at the upper part and lower at the lower part when seen from the cross section of the discharge port 42, so that the flow velocity of the cut tobacco is asymmetrically distributed up and down, and the moisture of the cut tobacco at the outlet is unevenly distributed up and down. That is, it is found that the straight wall connection between the discharge port 42 and the side wall of the second tower section 44 is an important cause of uneven distribution of moisture in the tobacco shreds at the outlet.

In addition, as shown in fig. 3, in the related art, an angle of approximately 90 ° is formed between a normal direction of the inlet port 41 and a normal direction of the outlet port 42. In this case, it is found that, in the discharge port 42, the flow rate of the cut tobacco is low on the side close to the feed port 41 (left side in fig. 3), and the flow rate of the cut tobacco is high on the side far from the feed port 41 (right side in fig. 3), so that the flow rate of the cut tobacco is asymmetrically distributed left and right when viewed from the cross section of the discharge port 42, and the moisture in the cut tobacco at the outlet is unevenly distributed left and right. That is, the research finds that the arrangement mode that the normal directions of the feeding port 41 and the discharging port 42 are 90 degrees is an important reason for the uneven left and right distribution of the moisture of the cut tobacco at the discharging port.

Based on the discovery, the structure of the cut tobacco drying tower 4 is improved by the method, so that the moisture distribution uniformity of cut tobacco at the outlet of the cut tobacco drying tower is improved, and the quality of finished cut tobacco is improved.

Fig. 4-5 schematically illustrate the structure of a tobacco drying tower 4 in an embodiment of the present disclosure.

In view of the problem of uneven distribution of moisture in the cut tobacco at the outlet, referring to fig. 4, in some embodiments, along the direction in which the material flows from the inlet 41 to the outlet 42 (i.e. along the direction from bottom to top in fig. 4), the side wall of the tower body 46 adjacent to the outlet 42 is gradually inclined outward. Specifically, as shown in fig. 4, in some embodiments, the side wall (labeled as a in fig. 4) of the second tower segment 44 on the side where the discharge port 42 is provided is inclined outward. The side wall (designated b in fig. 4) of the second tower segment 44 opposite the outlet opening 42 is not inclined but still extends vertically.

In the above-mentioned mode of setting up, no longer adopt straight wall connected mode between the lateral wall of discharge gate 42 and second tower section 44, but adopt the skew wall connected mode that leans out gradually, at this moment, the lateral wall that adjoins with discharge gate 42 of second tower section 44 inclines towards discharge gate 42, slow transition between the two, and no longer the rigid bending in right angle, thus, in the in-process of pipe tobacco flow direction discharge gate 42, lateral wall an can guide the air current to flow along the inner wall of outer slope, finally transition to discharge gate 42 gently, make pressure release gradually, thereby can reduce the velocity unevenness of both sides about the discharge gate to a certain extent, effectively improve export pipe tobacco velocity of flow distribution homogeneity from top to bottom, improve export pipe tobacco moisture distribution homogeneity from top to bottom.

In addition, referring to fig. 5, in some embodiments, the feeding port 41 and the discharging port 42 are disposed on opposite sides of the tower 46, in order to solve the problem of uneven distribution of moisture in the outlet tobacco shred.

Based on the above arrangement, the normal directions of the feeding port 41 and the discharging port 42 are no longer 90 degrees, but 180 degrees, in other words, the normal directions of the feeding port 41 and the discharging port 42 are no longer perpendicular to each other, but are parallel to each other, thus, the feeding and discharging directions of the cut tobacco drying tower 4 are not bent and distributed, but distributed in a forward direction, so that the speed difference caused by the 90-degree distribution of the feeding and discharging directions can be reduced, the left and right distribution uniformity of the flow velocity of the cut tobacco at the outlet is effectively improved, and the left and right distribution uniformity of the moisture of the cut.

Under the condition that the side wall of the tower body 46 adjacent to the discharge hole 42 gradually inclines outwards and the feed inlet 41 and the discharge hole 42 are arranged on two opposite sides of the tower body 46, the vertical distribution uniformity of the cut tobacco at the outlet can be improved, and the left and right distribution uniformity of the cut tobacco at the outlet can be improved, so that the water distribution uniformity of the cut tobacco at the outlet can be more effectively improved.

Fig. 6 and 7 show simulated cloud pictures of the flow velocity distribution of the cut tobacco at the outlet of the cut tobacco drying tower before and after modification respectively. Comparing fig. 6 and 7, it can be seen that the velocity of the cut tobacco at the outlet is about 36.25m/s on the left side before modification, the maximum value is reduced to 34.42m/s after modification, and the peak regions of the velocities on the left and right sides are obviously eliminated.

Therefore, the embodiment of the disclosure breaks through the defect that the discharging mode of the cut tobacco drying tower 4 is unreasonable in the related art, improves the structure of the cut tobacco drying tower 4 according to the motion characteristics of cut tobacco in the cut tobacco drying tower 4, particularly the motion characteristics of the top of the tower, redesigns the discharging direction and the transition structure, can effectively improve the uniformity of cut tobacco discharging, promotes the quality of cut tobacco, and improves the fine processing level of the tower-type airflow cut tobacco dryer 10.

The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims (10)

1. A cut-tobacco drying tower (4), characterized by comprising:

the tower body (46), be equipped with feed inlet (41) and discharge gate (42) on tower body (46), along the material by feed inlet (41) flow direction the direction of discharge gate (42), tower body (46) with the lateral wall that discharge gate (42) border on outwards slopes gradually.

2. Cut-tobacco drying tower (4) according to claim 1, characterized in that the tower body (46) comprises a first tower section (43) and a second tower section (44), the inlet (41) and the outlet (42) are arranged on the first tower section (43) and the second tower section (44), respectively, and the side wall of the second tower section (44) on the side where the outlet (42) is arranged is inclined outwards.

3. Cut-tobacco tower (4) according to claim 2, characterized in that the side wall of the second tower section (44) opposite the outfeed opening (42) extends vertically.

4. A cut-off tower (4) according to claim 2, wherein the tower body (46) further comprises a third tower section (45), the third tower section (45) being connected between the first tower section (43) and the second tower section (44), the third tower section (45) having a cross-sectional area which gradually increases in a direction from the first tower section (43) to the second tower section (44).

5. A cut-tobacco drying tower (4) according to claim 2, characterized in that the side walls of the first tower section (43) extend vertically.

6. Cut-tobacco drying tower (4) according to claim 1, characterized in that the inlet opening (41) is located below the outlet opening (42).

7. A cut-tobacco drying tower (4) according to any one of claims 1 to 6, wherein the inlet opening (41) and the outlet opening (42) are arranged on opposite sides of the tower (46).

8. A tower air dryer (10) comprising a dryer tower (4) according to any one of claims 1 to 7.

9. A cut-tobacco making system, characterized in that it comprises a tower-type air-flow cut-tobacco machine (10) according to claim 8.

10. A tobacco production system comprising the cut-tobacco production system of claim 9.

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