CN113647661B - Roller of redrying machine - Google Patents

Abstract

The application discloses a roller of a redrying machine, which comprises a roller body and a central air duct arranged in the roller body; the central wind tube extends along the axial direction of the tube body, the tube wall of the central wind tube is provided with a plurality of radial blowing parts, the blowing parts are blowing tubes with rectangular cross sections, and a blowing slit is formed between the two parallel plates. In this application, the square blowpipe on the central dryer provides radial hot-blast along the axial at 360 within ranges, makes whereabouts material fully dispersed, reduces material falling speed simultaneously, makes hot-blast and material fully contact, is favorable to improving material drying quality's homogeneity, stability and sense organ quality, promotes the moisture homogeneity of export material and reduces the blade and makes garrulous.

Description

Roller of redrying machine

Technical Field

The application relates to the technical field of tobacco manufacturing, in particular to a roller of a redrying machine.

Background

With the improvement of the technical level of the cigarette industry and the continuous improvement of the cigarette brand scale, higher requirements are put forward on the guarantee of cigarette raw materials. Threshing and redrying are necessary processing processes for changing tobacco leaves from agricultural products to raw materials in the cigarette industry, and play a role in drying materials. The key process technology and equipment level of threshing and redrying are improved, the supply requirement of the tobacco raw materials with stable quality and quality of cigarette industry enterprises is guaranteed, and the method becomes the key for the large-scale continuous healthy development of cigarette brands.

The redrying of tobacco flakes is one of the core technologies in the threshing and redrying process. On one hand, the existing drum-type drying process can simultaneously adopt the conduction heat transfer of the drum wall and the convection heat transfer of hot air for supplying heat, and the material drying heat transfer mode is the conduction-convection composite heat transfer; meanwhile, in the composite heat transfer drying process of the material, the axial motion transmission and the dispersion mixing process of material particles in the drying equipment exist. Therefore, from the characteristics of the process, the drum-type drying has advantages in the uniform dispersion degree of materials, the uniformity of moist hot air, the composite heat transfer efficiency and the drying dehydration efficiency.

For the tobacco flake redrying process, the uniformity of the temperature and humidity state and the air volume distribution of the hot drying air in the roller can obviously influence the drying uniformity of the tobacco flakes in the roller. In the drying process of the roller, when high-temperature hot air blows over the materials, heat and mass are transferred in a convection mode between the materials and the hot air, and the hot air can continuously take away moist hot air in the moist materials before reaching the saturated humidity of the hot air, so that the materials are dried. In the drying process, the temperature and the air quantity of hot air can greatly influence the gasification rate of the surface of the wet material and the diffusion rate of the wet components in the material.

The air distribution mode in the existing drum-type drying equipment is that hot air is directly introduced into one end of a drum through an air distributor, and the hot air directly enters the interior of a drum body through small holes in the air distributor and flows in parallel or in countercurrent with materials.

Disclosure of Invention

The application provides a cylinder of redrying machine, rectangle jetting pipe on the central dryer provides radial hot-blast along the axial at 360 within ranges, makes whereabouts material fully dispersed, reduces material falling speed simultaneously, makes hot-blast and material fully contact, is favorable to improving material drying quality's homogeneity, stability and sense organ quality, promotes the moisture homogeneity of export material and reduces the blade and makes garrulous.

The application provides a roller of a redrying machine, which comprises a roller body and a central air duct arranged in the roller body;

the central wind tube extends along the axial direction of the tube body, the tube wall of the central wind tube is provided with a plurality of radial blowing parts, the blowing parts are blowing tubes with rectangular cross sections, and a blowing slit is formed between the two parallel plates.

Preferably, the blowing section is provided with an adjusting mechanism for adjusting the width of the slit.

Preferably, the adjustment mechanism comprises a screw and a nut.

Preferably, an axial partition plate is arranged in the central air duct, and the cavity of the central air duct is divided into an upper cavity and a lower cavity by the partition plate.

Preferably, the volume of the lower cavity is greater than the volume of the upper cavity.

Preferably, the body of center dryer is the cylinder pipe, and from the feed end of barrel to the discharge end of barrel, the aperture ratio of center dryer increases gradually.

Preferably, the central wind tube comprises at least two wind tube sections, and the diameter of the wind tube section close to the feeding end of the tube body is larger than that of the wind tube section close to the discharging end of the tube body.

Preferably, a plurality of bending shoveling plates are uniformly distributed on the inner wall of the cylinder along the circumferential direction, the bending shoveling plates extend along the axial direction of the cylinder, and the end parts of the bending shoveling plates have preset bending angles relative to the body of the bending shoveling plates.

Preferably, the body of the bending type shoveling plate is provided with a first heating pipe, and the first heating pipe extends along the length direction of the bending type shoveling plate.

Preferably, the inner wall of the cylinder body is provided with a second heating pipe, and the second heating pipe extends along the length direction of the cylinder body.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

FIG. 1 is a block diagram of a redrying machine provided herein;

FIG. 2 is a block diagram of a redrying machine provided herein with at least the drum removed;

FIG. 3 is a primary block diagram of the hot air system and moisture removal system provided herein;

4-7 are front, left, top, and perspective views, respectively, of one embodiment of an end face provided herein;

FIG. 8 is a block diagram of the moisture removal system and the discharge hood provided herein;

FIG. 9 is a block diagram of a moisture excluding hood provided by the present application;

FIG. 10 is a block diagram of one embodiment of a center air duct provided herein;

FIG. 11 is a block diagram of a preferred embodiment of FIG. 10;

fig. 12 and 13 are block diagrams of another embodiment of a center air duct provided herein;

FIG. 14 is a block diagram of one embodiment of a cartridge provided herein;

FIG. 15 is a block diagram of another embodiment of a cartridge provided herein;

FIG. 16 is a block diagram of yet another embodiment of a cartridge provided herein;

FIG. 17 is a structural view of a bent flight with heating tubes as provided herein;

FIG. 18 is a block diagram of yet another embodiment of a cartridge provided herein.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

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 all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

The application provides a redrying machine. As shown in fig. 1-2, the redrying machine includes a feeding portion 100, a hot air system 300, a roller 200, a moisture removing system 400, a discharging portion 500, and a frame 600. The material enters the drum 200 through the feeding portion 100, and the dried material is output to the next process through the discharging portion 500. The hot air system 300 sends the generated hot air into the drum 200 through the feeding part 100, the hot air contacts with the material, the moist hot air in the material is blown out, the material is dried, and the moist hot air (i.e. moisture exhaust waste gas) is discharged out of the redrying machine through the moisture exhaust system 400.

The frame 600 is used for supporting the drum 200, and is provided with a speed reducer for driving the drum 200, a lifting mechanism (for jacking up the drum 200 when the redrying machine stops) of the drum 200, and an inclination angle adjusting device of the drum 200. As an embodiment, the frame is formed by butt welding rectangular steel pipes and steel plates. As shown in fig. 1 and 2, the feed end of the drum 200 (i.e., the end near the feed portion 100) is higher than the discharge end of the drum 200 (i.e., the end near the discharge portion 500), facilitating the discharge of the material.

The feeding portion 100 comprises a horizontal conveying belt and an end face 110 fixed at a first end portion of the conveying belt, a roller 200 is arranged at a second end portion of the conveying belt, the end face 110 is perpendicular to the conveying belt, the end face 110 is used for being connected with a discharging portion of a previous process and the hot air system 300, and a feeding port and at least one air inlet are formed in the end face 110. The feed inlet is arranged above the conveyor belt and is used for conveying materials (such as tobacco flakes) onto the conveyor belt and further to the drum 200. The air inlet inputs hot air of the hot air system into the feeding portion 100, and then delivers the hot air to the drum 200. The feeding part 100 further comprises a feeding cover wrapping the conveying belt, so that the feeding part forms a closed space to prevent hot air from leaking to the outside. The specific structure of the drum and the hot air system is described below.

The drum 200 includes a drum 210 and a central air duct 220 disposed inside the drum, the central air duct 220 extends in an axial direction of the drum 210, and the drum 210 is coaxial with the central air duct 220. A plurality of radial blowing parts are arranged on the central wind barrel 220 along the circumferential direction, and hot air is sprayed out from the blowing parts to dry the materials.

The discharging part 500 comprises a conveying belt and a discharging cover 510 wrapping the conveying belt, and an air outlet is arranged at the top of the discharging cover 510. The material output from the discharge port of the drum 200 falls to the conveyor belt of the discharge portion 500 by the action of gravity, and is output by the conveyor belt in a vibrating manner.

As shown in fig. 8, the moisture exhausting system 400 includes a moisture exhausting cover 410, a moisture exhausting damper 420, a moisture exhausting fan 430, and a moisture exhausting duct 440, which are connected in sequence. The moisture exhausting hood 410 includes a first air inlet, a second air inlet and an air outlet, the first air inlet of the moisture exhausting hood 410 is connected with the air outlet of the discharging hood 510, and the second air inlet is connected with the auxiliary hot air pipe 340, please refer to fig. 3. The hot air in the roller is contacted with the materials to blow out the moist hot air in the materials, and the moist hot air is discharged through the moisture removal system. The auxiliary hot air pipe conveys a part of hot air to be mixed with the high-humidity moisture-discharging waste gas, so that the temperature of the moisture-discharging waste gas is increased, and the generation of condensed water is prevented.

Preferably, as shown in fig. 9, a filter screen 450 is rotatably disposed in the moisture exhaust cover, an air inlet direction of a first air inlet of the moisture exhaust cover is consistent with a radial direction of the filter screen 450, the moisture exhaust gas enters the moisture exhaust cover through the first air inlet and is exhausted from the moisture exhaust air duct through the rotating filter screen, and the rotating filter screen prevents fine tobacco flakes included in the moist hot air from being exhausted along with the moisture exhaust gas. Preferably, compressed air is intermittently introduced into the filter screen to prevent the filter screen from being blocked by the fine tobacco flakes.

Compared with the existing drum-type redrying machine, the rotating central air cylinder can fully disperse falling materials by radially spraying hot air blown out, and meanwhile, the falling speed of the materials is reduced, so that the hot air is fully contacted with the materials, the uniformity, the stability and the sensory quality of the drying quality of the materials are improved, the moisture uniformity of the materials at an outlet is improved, and the breakage of blades is reduced.

On the basis of the above, as shown in fig. 4-7, preferably, the end surface 110 includes an air inlet cavity 1101 enclosed by the outer side plate and the inner side plate, and the size of the inner side plate is smaller than that of the outer side plate. The air inlet cavity 1101 is communicated with a second air inlet 1107, an air inlet portion 1102 and a first feed inlet are arranged on the outer side plate, and the first feed inlet is arranged below the air inlet portion 1102. The air inlet portion 1102 is a cavity, a first end face of the air inlet portion 1102 is provided with a second air inlet 1107, a second end face is provided with a first air inlet 1103, and the first end face is perpendicular to the second end face. The air inlet duct 1108 passes through the air inlet portion 1102 and the air inlet chamber 1101 in sequence from the first air inlet 1103 and extends from the inner side plate toward the drum 200, and the end of the air inlet duct 1108 forms a first air outlet 1105, i.e., a first air inlet at the feeding end of the drum 210. The inner side plate is provided with a second feed inlet 1109, and a second air outlet 1104 and a third air outlet 1106 which are respectively arranged at the upper side and the lower side of the second feed inlet 1109, the second air outlet 1104 and the third air outlet 1106 are communicated with the air inlet cavity 1101, and the air inlet pipeline 1108 extends out of the second air outlet 1104 and then extends downwards to the central air duct. The first feed inlet and the second feed inlet are opposite in position to form a horizontal feed channel as a feed inlet of the end face. The hot air enters the barrel through the second air outlet 1104 to form a second air inlet at the feed end of the barrel. The hot air enters the barrel through the third air outlet 1106 to form a third air inlet at the feed end of the barrel.

In the preferred embodiment, the hot air system is shown in fig. 3, and the hot air system includes a first hot air subsystem and a second hot air subsystem, the first hot air subsystem includes a first hot air heater 350 and a first hot air duct 320, a first end of the first hot air duct 320 is connected to the first hot air heater 350, and a second end of the first hot air duct 320 is connected to the first air inlet 1103. As an embodiment, the air inlet end of the central air duct 220 is rotatably connected to the air inlet duct 1108 by a hard connection manner such as a bearing, so that the cylinder and the central air duct rotate coaxially and synchronously. As another embodiment, the rotation of the central air duct 220 relative to the air inlet duct 1108 is realized by a flexible connection, so that the drum and the central air duct rotate coaxially and synchronously. As another embodiment, the air inlet end of the central air duct 220 is fixedly connected to the air inlet duct 1108. The second hot air subsystem comprises a second hot air heater 310 and a second hot air duct 330, a second end of the second hot air duct 330 is connected with the second hot air heater 310, and a second end of the second hot air duct 330 is connected with a second air inlet 1107.

As an embodiment, the hot wind generated by the first hot wind heater 350 enters the central air duct through the first wind inlet 1103 and the first wind outlet 1105, and the hot wind is blown into the cylinder along the radial direction of the cylinder through the radial blowing part. The hot air generated by the second hot air heater 310 enters the annular space formed by the cylinder body and the central air cylinder through the second air inlet 1107, the second air outlet 1104 and the third air outlet 1106 and the space enclosed by the feeding cover, and the part of the hot air is blown in from the upper part and the lower part of the feeding port 1109 along the axial direction of the cylinder body. In this embodiment, hot-blast top, below and the center department of barrel of following the material get into the barrel respectively for the area of contact greatly increased of material and hot-blast, improved drying efficiency and drying uniformity.

It can be understood that the first hot air subsystem and the second hot air subsystem can provide hot air with different temperatures, so that the drying of the material is more efficient.

It can be understood that the redrying machine further comprises baffles for the first air outlet, the second air outlet and the third air outlet respectively, and one or both of the first air outlet, the second air outlet and the third air outlet can be closed as required.

The air intake mode can be selected singly or in combination according to the dewatering amount and the dehumidifying amount. As an example, in the air inlet mode of the single central air cylinder, hot air is subjected to convection drying along the radial direction of the cylinder body through the first air outlet, the hot air and materials can be fully mixed, the drying efficiency is improved, and the air inlet mode is suitable for materials with conventional moisture. As another example, when the moisture content of the incoming material is high, the wind resistance of the central wind cylinder is large, so that the requirement of convection drying cannot be met, and the lower wind inlet mode can be started simultaneously, so that the hot wind quantity of the system is increased.

It is still understood that the redrying machine may also be provided with air volume adjusting devices for the first outlet, the second outlet and the third outlet, such as a first orifice plate and a second orifice plate which can move relatively, for adjusting the air volume. Under different states, the coincidence degree of the holes on the first pore plate and the holes on the second pore plate is different.

Because the wind speed of the hot air in the central air cylinder gradually attenuates from the feeding end to the discharging end, compared with the feeding end, the drying effect of the hot air at the discharging end is poor. In order to solve the technical problem, the present application provides the following embodiments of the central wind tunnel.

As an embodiment, the body of the central wind tunnel 220 is a cylindrical tube, and the aperture ratio of the central wind tunnel gradually increases from the feeding end to the discharging end to compensate for the attenuation of the wind speed.

As another embodiment, the central wind tunnel 220 includes at least two wind tunnel sections, the diameter of the wind tunnel section near the feeding end of the wind tunnel is larger than the diameter of the wind tunnel section near the discharging end of the wind tunnel, the aperture size on each wind tunnel section is consistent, the number of the holes is consistent, and the aperture ratio is preferably 20-40%. This embodiment avoids the not good problem of drying effect that central dryer brought in the excessive decay of discharge end department, and central dryer spun hot-blast distribution is more even, and hot-blast temperature, the amount of wind of each section in the whole barrel remain stable, have improved drying efficiency, have effectively avoided the dry inhomogeneous phenomenon of a section of thick bamboo interior material, and drying effect obtains greatly promoting.

As an example, as shown in fig. 2 and 3, the central air duct 220 includes a first air duct 2201 and a second air duct 2202, and the diameter of the first air duct 2201 is larger than that of the second air duct 2202.

In this example, as an embodiment, the end portions of the first air duct 2201 and the second air duct 2202 are connected through a flange and are communicated with each other, and the first air duct and the second air duct are spliced to form the whole central air duct.

In this example, as a preferred embodiment, the second air duct 2202 is partially nested inside the first air duct 2201. Specifically, a part of the first end (i.e., the end close to the feeding portion) of the second air duct 2202 is inserted into the first air duct 2201, the first end of the first air duct 2201 is detachably connected with the first end of the second air duct 2202, the second end of the second air duct 2202 is closer to the discharging cover than the second end of the first air duct 2201, and the part of the second air duct 2202 inserted into the first air duct has no blowing portion. A plurality of radial support rods are arranged on the inner wall of the first air duct 2201 and the outer wall of the second air duct 2202 and used for supporting two sections of air ducts, and a central air duct formed by the first air duct 2201 and the second air duct 2202 rotates as a whole.

In the two-duct-nested embodiment, as an example, a first air inlet duct and a second air inlet duct are disposed between the first air inlet 1103 and the first air outlet 1105, the diameter of the second air inlet duct is smaller than that of the first air inlet duct, and the second air inlet duct is inserted into the first air inlet duct. The air outlet of the first air inlet pipeline is connected with the first air duct 2201, so that the first air inlet pipeline and the first air duct are communicated. The air outlet of the second air inlet pipe forms a fourth air inlet of the cylinder body, the fourth air inlet is concentric with the first air inlet of the cylinder body, and the air outlet of the second air inlet pipe is connected with the second air duct 2202 so as to be communicated with the second air duct. In the preferred embodiment, the second end of the second hot air duct is connected to the first air intake duct. The hot air generated by the second hot air heater enters the space between the first air duct and the second air duct through the first air inlet pipeline, and the hot air is blown into the part, close to the feeding part, in the barrel along the radial direction of the barrel. Meanwhile, the hot air system further comprises a third hot air subsystem, the third hot air subsystem comprises a third hot air heater and a third hot air pipe, the first end of the third hot air pipe is connected with the third hot air heater, and the second end of the third hot air pipe is connected with a second air inlet pipeline. The hot air generated by the third hot air heater enters the second air duct through the second air inlet pipeline, and the hot air is blown into the part, close to the discharging part, in the barrel along the radial direction of the barrel.

Preferably, the temperature of the hot air in the third hot air subsystem is different from that of the hot air in the second hot air subsystem, and the material is dried by the hot air with different temperatures at the feeding end and the discharging end of the cylinder, so that the material is dried more efficiently.

In the two air duct nested embodiment, as another example, the hot air generated by the first hot air heater 350 enters the second air duct 2202 through the first air inlet 1103 and the first air outlet 1105, and the hot air is blown into the cylinder portion close to the discharging cover from the radial direction through the second air duct 2202. Hot air generated by the second hot air heater 310 enters an annular space between the first air cylinder 2201 and the second air cylinder 2202 through the second air inlet 1107, the second air outlet 1104 and the third air outlet 1106 and a space enclosed by the feeding cover, and the hot air is blown into a cylinder part close to the feeding cover from the radial direction.

The first air duct and the second air duct can blow hot air simultaneously or respectively. According to the drying principle, when wet materials just enter the barrel, the moisture content is large, hot air with high temperature is used for drying the materials at the moment, surface water of the materials is evaporated quickly, therefore, the first air duct adopts the hot air with high temperature for blowing, after the surface water is evaporated, the temperature of the materials starts to be increased, in order to obtain good material quality at low temperature, the low-temperature hot air is used for drying the materials, and therefore, the second air duct adopts the hot air with low temperature for blowing.

As an embodiment, the auxiliary hot air duct may be a branch duct of the first air inlet duct, the second air inlet duct or the third air inlet duct.

As an example, the blowing section 2203 of the blowing section on the center air duct is a columnar blowing tube.

However, since the tubular blowing portion does not provide hot air at a position in the cylindrical body where the blowing portion is not provided, and the hot air is not uniformly distributed in the cylindrical body, it is preferable that, as an example, as shown in fig. 12 and 13, the blowing portion 2203 is a blowing pipe having a rectangular cross section, a blowing slit is formed between two parallel plates, and a plurality of adjusting mechanisms (not shown in fig. 12) for adjusting the slit width are provided on the blowing portion 2203 to adjust the air output of the blowing portion. As one example, the adjustment mechanism is a screw nut assembly. In this embodiment, the central air duct does not rotate, facilitating the adjustment of the width of the slit by the adjustment mechanism 2206. On the basis, due to the existence of gravity, the material falls into the lower part of the barrel in the material stirring process, so that preferably, an axial partition plate is arranged in the central air duct, and the cavity of the central air duct is divided into an upper cavity and a lower cavity by the partition plate. As shown in fig. 13, the partition plate divides the central air duct into an upper cavity and a lower wall with the same size. Preferably, the volume of lower cavity is greater than the volume of upper cavity for the lower part of central dryer exports stronger hot-blast, makes the energy obtain effective utilization.

Preferably, as another embodiment, as shown in fig. 10, the blowing portion 2204 on the central air duct is a strip-shaped hole extending along the axial direction of the central air duct, the strip-shaped hole is in a trapezoidal shape, the small opening end is close to the feeding end of the barrel, and the large opening end is close to the discharging end of the barrel, so as to adjust the opening degree of the hot air and compensate for the attenuation of the wind speed. On the basis, as shown in fig. 11, a plurality of baffles 2205 are uniformly arranged on the outer circumferential surface of the central wind cylinder along the axial direction, and the baffles 2205 can also be arranged progressively, and are used for adjusting the air output.

For the cylinder 210, the following structures of the embodiments may be adopted. The cylinder body of the following embodiments can be matched with any one of the central wind cylinders to achieve the purpose of drying materials.

As an embodiment, a plurality of shoveling plates are uniformly distributed on the cylinder body along the circumferential direction, extend along the axial direction of the cylinder body and are used for assisting materials to perform shoveling movement in the rotation process of the cylinder body, and the materials are thrown under the action of the shoveling plates and then are contacted with hot air to realize drying. In this embodiment, the preferable scheme of the central wind barrel is as follows: a row of blowing parts are arranged at the position of the central wind barrel corresponding to the space between every two shoveling plates, as shown in fig. 12, each row of blowing parts provides hot wind for the materials in the corresponding shoveling plate interval in a targeted manner, so that the materials in the barrel can be dried more uniformly.

FIG. 14 illustrates one embodiment of a slate, which employs a straight slate 2101. For the application scenario of larger particulate materials such as smoked sheets, considering the motion transmission property of the materials in the cylinder, in order to reduce the throwing angle and the spreading angle of the materials during the material-making motion and reduce the fall of the throwing motion, the shoveling plate is preferably a bent shoveling plate 2102, as shown in fig. 15 and 17. The end part of the bending shoveling plate has a certain bending angle relative to the body, and the throwing motion fall of the materials in the cylinder body is effectively reduced.

Preferably, a plurality of heating pipes are uniformly arranged on the inner wall of the cylinder 210, and as shown in fig. 16, the heating pipe 2104 extends along the axial direction of the cylinder. In the preferred embodiment, the redrying machine further comprises a steam heating system, the steam heating system conveys the generated steam to the heating pipe on the cylinder body, the heating pipe releases heat, air in the cylinder body is heated, the material is dried, and condensed water formed after the steam is condensed is discharged through a water discharge pipeline. The heating pipe on the inner wall of the cylinder body plays a role in heat preservation of hot air in the cylinder body, and the drying speed of materials can be improved.

On the basis, preferably, a plurality of heating pipes are uniformly distributed on the straight board shoveling plate and the bending type shoveling plate. Taking the bent sheet 2102 shown in fig. 17 as an example, the heating pipe 2103 extends in the longitudinal direction of the bent sheet 2102.

In the preferred embodiment, the principles of the redrying machine are as follows: the inner wall of barrel and the material copying plate rise to the assigned temperature under the effect of steam, the material is sent into redrying machine through the conveyer belt, the material is constantly fried in the material is constantly turned over to the barrel at rotatory in-process material copying plate, the material constantly carries out the conduction drying with the inner wall contact of barrel, simultaneously, the hot-blast abundant contact of material in the hot-blast and the section of thick bamboo that blows off of central air cylinder carries out the convection drying, the moist hot-blast after the drying is discharged the barrel under the row damp fan effect of discharge end, arrange the damp air door in the damp pipeline, carry out corresponding regulation and control through the data of export moisture meter feedback, control program is through changing the moisture discharge volume, hot-blast temperature adjusts slice cigarette export moisture, thereby realize the control to export moisture.

As another example, as shown in FIG. 18, the inner wall of the cylinder 210 is designed to have a wave-shaped structure, so that the material is thrown up and down during the drying process, and is easier to quickly dehydrate and dry.

The beneficial effects of this application are as follows:

1. in this application, central dryer provides radial hot-blast at 360 within ranges, makes whereabouts material homodisperse, reduces material falling speed simultaneously, makes hot-blast and material fully contact, is favorable to improving homogeneity, stability and sense organ quality of material drying quality, promotes the moisture homogeneity of export material and reduces the blade and makes garrulous

2. In this application, hot-blast top, the below of following the material and the center department of barrel get into the barrel respectively for material and hot-blast area of contact greatly increased have improved drying efficiency and drying uniformity.

3. In this application, it carries partly hot-blast and the row's of high humidity tide waste gas mixture to assist the hot-blast pipe, promotes row's tide exhaust gas temperature, prevents the production of comdenstion water.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims (8)

1. The roller of the redrying machine is characterized by comprising a roller body and a central air duct arranged in the roller body;

the central air duct extends along the axial direction of the barrel, a plurality of radial blowing parts are arranged on the tube wall of the central air duct, each blowing part is a blowing tube with a rectangular cross section, and a blowing slit is formed between the two parallel plates;

and the blowing part is provided with an adjusting mechanism for adjusting the width of the blowing slit, and the adjusting mechanism comprises a screw and a nut.

2. The cylinder of claim 1, wherein the central air duct has an axial partition plate disposed therein, the partition plate dividing the cavity of the central air duct into an upper cavity and a lower cavity.

3. The cylinder of a redryer according to claim 2 wherein the volume of the lower cavity is greater than the volume of the upper cavity.

4. The roller of the redrying machine of claim 1, wherein the body of the central air duct is a cylindrical tube, and the aperture ratio of the central air duct gradually increases from the feeding end of the roller to the discharging end of the roller.

5. The redryer drum of claim 1, wherein the central air duct comprises at least two air duct sections, the diameter of the air duct section near the feed end of the drum being greater than the diameter of the air duct section near the discharge end of the drum.

6. The cylinder of the redrying machine of claim 4 or 5, wherein a plurality of bending shoveling plates are uniformly distributed on the inner wall of the cylinder along the circumferential direction, the bending shoveling plates extend along the axial direction of the cylinder, and the end parts of the bending shoveling plates have a predetermined bending angle relative to the body of the bending shoveling plates.

7. The roller of the redrying machine of claim 6, wherein the body of the bent shoveling plate is provided with a first heating pipe, and the first heating pipe extends along the length direction of the bent shoveling plate.

8. The roller of a redrying machine of claim 7, wherein the inner wall of the roller body is provided with second heating pipes, and the second heating pipes extend along the length direction of the roller body.

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