CN219390419U - Hot air system - Google Patents
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- CN219390419U CN219390419U CN202320341526.0U CN202320341526U CN219390419U CN 219390419 U CN219390419 U CN 219390419U CN 202320341526 U CN202320341526 U CN 202320341526U CN 219390419 U CN219390419 U CN 219390419U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a hot air system, relates to the field of tobacco equipment, and is used for realizing a multi-air supply mode of a dryer. The hot air system is used for the dryer, and the hot air system includes fan, first branch road and second branch road. The first branch is positioned downstream of the fan and is in fluid communication with the fan; the downstream wall body of the first branch is provided with a first air outlet. The second branch is positioned downstream of the fan and is in fluid communication with the fan; the downstream wall of the second branch is provided with a second air outlet. Wherein the first branch and the second branch are independent; the bending direction of the first branch is opposite to that of the second branch, and the downstream end of the first branch is fixed with the downstream end of the second branch. According to the technical scheme, the heat transfer effect of the materials and the evaporation rate of water vapor are improved, and the drying efficiency is high.
Description
Technical Field
The utility model relates to the field of tobacco equipment, in particular to a hot air system.
Background
The drier is one of the core process equipment in the tobacco industry, and the main process aims to remove part of moisture in materials (such as tobacco) and the green miscellaneous gas and part of free nicotine escape along with the evaporation of the moisture, so as to realize the drying and shaping of the materials, improve the physical quality and the sensory quality of the materials. Among them, the drum dryer is the main stream drying equipment of the tobacco industry. The green miscellaneous gas is a miscellaneous gas of the green-containing tobacco leaves, and the green-yellow tobacco leaves which are obtained by immature harvest or are improperly modulated have obvious green miscellaneous gas.
In the related art, the dryer includes a drum and a hot air system. The hot air system blows hot air into the drum from either the front or rear chamber of the drum.
The inventors found that at least the following problems exist in the prior art: most of hot air in the roller only contacts with materials on the surface layer to transfer heat and water vapor, so that the heat transfer and mass transfer area is small, the heat transfer effect of the materials and the evaporation rate of the water vapor are affected, and the drying efficiency is low.
Disclosure of Invention
The utility model provides a hot air system for realizing a multi-air supply mode of a dryer.
The embodiment of the utility model provides a hot air system, which is used for a dryer and comprises:
a blower;
a first branch downstream of the fan and in fluid communication with the fan; a first air outlet is formed in the wall body at the downstream of the first branch; and
a second branch downstream of the fan and in fluid communication with the fan; a second air outlet is formed in the downstream wall of the second branch;
wherein the first leg and the second leg are independent; the bending direction of the first branch is opposite to the bending direction of the second branch, and the downstream end of the first branch and the downstream end of the second branch are fixed.
In some embodiments, the first leg comprises:
a first air duct having one end in fluid communication with the blower;
a first connecting tube, one end of which is in fluid communication with the other end of the first air tube; and
the first heating pipe component is in fluid communication with the other end of the first connecting pipe and is in dynamic sealing, the communication position is the end part of the first heating pipe component, or the communication position is a first through hole formed in the wall body adjacent to the end part of the first heating pipe component;
wherein, a plurality of first air outlet holes are arranged on the wall body of the first heating pipe component.
In some embodiments, the first heating tube assembly comprises:
the wall body of the first heating pipe is provided with a plurality of first air outlet holes; the first heating tube and the first connecting tube are in dynamic sealing and fluid communication; and
the first shoveling plate is arranged on the outer wall of the first heating pipe.
In some embodiments, one end of the first connecting tube is nested with one end of the first heating tube; the first heating tube assembly further comprises:
the first sealing plate is arranged in the first heating pipe and is positioned at the nesting position of the first heating pipe and the first connecting pipe; the first sealing plate is fixedly connected with the first heating pipe and bends towards the inner wall of the first heating pipe; the first sealing plate is elastic, and the first sealing plate abuts against the outer wall of the first connecting pipe under self elasticity.
In some embodiments, the sum of the cross-sectional areas of all the first air outlet holes is 1.5 to 2.5 times the ventilation cross-sectional area of the first heating pipe.
In some embodiments, the central axis of each of the first air outlet holes is perpendicular to the central axis of the first heating pipe.
In some embodiments, the second leg comprises:
a second air duct having one end in fluid communication with the blower;
a second connecting pipe, one end of which is in fluid communication with the other end of the second air pipe; and
the second heating pipe component is in fluid communication with the other end of the second connecting pipe, the communication position is the end part of the second heating pipe component, or the communication position is a second through hole formed in the wall body adjacent to the end part of the second heating pipe component;
wherein, a plurality of second air outlet holes are arranged on the wall body of the second heating pipe component.
In some embodiments, the second heating tube assembly comprises:
the wall body of the second heating pipe is provided with a plurality of second air outlet holes, and the second heating pipe is in dynamic sealing and fluid communication with the second connecting pipe; and
the second shoveling plate is arranged on the outer wall of the second heating pipe.
In some embodiments, one end of the second connecting tube is nested with one end of the second heating tube; the second heating tube assembly further comprises:
the second sealing plate is arranged in the second heating pipe and is positioned at the nesting position of the second heating pipe and the second connecting pipe; the second sealing plate is fixedly connected with the second heating pipe and bends towards the inner wall of the second heating pipe; the second sealing plate is elastic, and the second sealing plate abuts against the outer wall of the second connecting pipe under self elasticity.
In some embodiments, the sum of the cross-sectional areas of all the second air outlet holes is 1.5 to 2.5 times the ventilation cross-sectional area of the second heating pipe.
In some embodiments, the central axis of each of the second air outlet holes is perpendicular to the central axis of the second heating pipe.
In some embodiments, the central axes of the first heating tube and the second heating tube are coincident and the respective central axes are all oblique.
In some embodiments, the first heating tube and the second heating tube are integral, and a divider plate is mounted at the interface of the first heating tube and the second heating tube to divide the fluid within the first heating tube and the second heating tube.
In some embodiments, the number of the first shoveling plates is plural, the plural first shoveling plates are arranged along the circumferential direction of the first heating pipe, and the plane of each first shoveling plate passes through the central axis of the first heating pipe.
In some embodiments, a plurality of first air outlets are formed in a wall body of the first heating pipe assembly located between two adjacent first shoveling plates.
In some embodiments, the number of the second shoveling plates is plural, the plural second shoveling plates are arranged along the circumferential direction of the second heating pipe, and the plane of each second shoveling plate passes through the central axis of the second heating pipe.
In some embodiments, a plurality of second air outlets are formed in a wall body of the second heating pipe assembly located between two adjacent second shoveling plates.
In some embodiments, the downstream end of the first leg and/or the downstream end of the second leg is configured to extend into a mid-position along the length of the drum.
The hot air system provided by the technical scheme comprises a first branch and a second branch which are relatively independent; in the use, first branch road, second branch road all can stretch into the inside of cylinder. The first branch, the second branch or the first branch and the second branch can be conducted according to the requirement, so that different air supply modes of the roller can be realized. The first branch is provided with first air outlet, and the second branch includes the second air outlet, can send the inside required position of cylinder with hot-blast through first air outlet, second air outlet. And the hot air output by the first branch and the second branch is output from the respective heating pipes to the inside of the roller, most of the hot air can be in contact with the materials on the surface layer and the materials in the roller, so that heat transfer and water vapor transfer exist, the heat transfer and mass transfer areas are large, the heat transfer effect of the materials and the evaporation rate of the water vapor are improved, and the drying efficiency is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
fig. 1 is a schematic structural diagram of a hot air system installed in a dryer according to an embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of a first heating tube assembly of the hot air system according to an embodiment of the present utility model.
FIG. 3 is a schematic view of a first heating tube assembly of a hot air system according to an embodiment of the present utility model.
Reference numerals:
1. a blower; 2. a first branch; 3. a second branch; 4. a heater; 5. a roller;
20. a first air outlet hole; 30. a second air outlet hole;
21. a first air duct; 22. a first connection pipe; 23. a first heating tube assembly; 24. a first damper; 25. a partition plate;
230. a first through hole; 231. a first heating pipe; 232. a first shoveling plate; 233. a first sealing plate; 234. a pressing plate; 235. a fastener;
31. a second air duct; 32. a second connection pipe; 33. a second heating tube assembly; 34. a second air valve;
330. a second through hole; 331. a second heating pipe; 332. and a second shoveling plate.
Detailed Description
The technical scheme provided by the utility model is described in more detail below with reference to fig. 1 to 3.
Referring to fig. 1 and 2, an embodiment of the present utility model provides a hot air system for a dryer. The hot air system comprises a fan 1, a first branch circuit 2 and a second branch circuit 3. The first branch 2 is located downstream of the fan 1 and is in fluid communication with the fan 1; the downstream wall of the first branch 2 is provided with a first air outlet 20. The second branch 3 is located downstream of the fan 1 and is in fluid communication with the fan 1; the downstream wall of the second branch 3 is provided with a second air outlet 30. Wherein the first branch 2 and the second branch 3 are independent; the bending direction of the first branch 2 is opposite to the bending direction of the second branch 3, and the downstream end of the first branch 2 and the downstream end of the second branch 3 are fixed.
The fan 1 is used for outputting wind. During the operation of the dryer, it is necessary to supply hot air into the drum 5. The hot air is air with the temperature meeting the drying requirement of the materials in the roller 5, and the temperature of the hot air is determined according to the materials to be treated in the roller 5.
In order to make the temperature of the wind outputted from the blower 1 relatively high, a heater 4 may be installed upstream of the blower 1, and the wind required to enter the blower 1 is heated by the heater 4.
A first branch 2 and a second branch 3 are arranged downstream of the fan 1. The first branch 2 and the second branch 3 are alternatively conducted to convey hot air into the drum 5 of the dryer. The direction of the hot air conveyed by the first branch 2 and the second branch 3 is different. One of the first branch 2 and the second branch 3 is used for conveying hot air along the flow direction of the material, and is also called a forward flow mode. The other of the first branch 2, the second branch 3 is used for conveying hot air against the flow direction of the material, also called counter-current mode.
The technical scheme can meet the requirements that the material is processed in the drum 5 in a concurrent flow or in a countercurrent flow, or the material is switched in the concurrent flow and the countercurrent flow in the processing process of the drum 5, and the hot air entering the drum 5 is far away from the moisture discharging pipe of the dryer, so that the heat exchange time between the hot air and the material is prolonged.
For clarity of description of the technical solution of the embodiment of the present utility model, the flow direction of the wind conveyed by the first branch 2 along the material flow direction and the flow direction of the wind conveyed by the first branch 2 against the material flow direction will be described as an example.
The downstream of the fan 1 is provided with a first branch 2 and a second branch 3. The first branch 2 and the second branch 3 are independent, i.e. the air flow in the first branch 2 does not flow into the second branch 3, nor does the air flow in the second branch 3 flow into the first branch 2. The specific implementation of the first branch 2 and the second branch 3 will be described below.
Referring to fig. 1, the first branch circuit 2 includes a first air duct 21, a first connection pipe 22, and a first heating pipe assembly 23. One end of the first air duct 21 is in fluid communication with the fan 1. One end of the first connection pipe 22 is in fluid communication with the other end of the first air duct 21. The first heating tube assembly 23 is in fluid communication with the other end of the first connecting tube 22 and is sealed dynamically. During operation of the apparatus, the first connecting tube 22 is stationary and the first heating tube assembly 23 rotates with the rotation of the drum 5. And, the center of rotation of the first heating tube assembly 23 coincides with the center of rotation of the drum 5. The pipe diameter of the first connecting pipe 22 is smaller than that of the first heating pipe assembly 23, and one end of the first connecting pipe 22 is sleeved at one end of the first heating pipe 231. Sealing filler is arranged at the sleeving position of the two to prevent hot air in the hot air system from escaping when the equipment operates.
Referring to fig. 1, a first damper 24 may be installed inside the first duct 21 to control on and off of the first branch 2.
The communication position between the first heating tube assembly 23 and the first connecting tube 22 is the end part of the first heating tube assembly 23, or the communication position between the first heating tube assembly 23 and the first connecting tube 22 is a first through hole 230 formed in the wall body adjacent to the end part of the first heating tube assembly 23. Wherein, the wall of the first heating tube assembly 23 is provided with a plurality of first air outlet holes 20.
In some embodiments, one of the ends of the first connecting tube 22 nests with one of the ends of the first heating tube 231. The first heating tube assembly 23 further comprises a first sealing plate 233, wherein the first sealing plate 233 is disposed in the first heating tube 231 and is positioned at the nesting position of the first heating tube 231 and the first connecting tube 22; the first sealing plate 233 is fixedly connected with the first heating pipe 231 and is bent toward the inner wall of the first heating pipe 231; the first sealing plate 233 is configured to be elastic, and the first sealing plate 233 abuts against the outer wall of the first connection pipe 22 under its own elastic force.
The length direction of the first air pipe 21 and the first heating pipe assembly 23 is approximately the same as the length direction of the roller 5 of the dryer or forms a certain included angle.
Referring to fig. 2, the first heating pipe assembly 23 includes a first heating pipe 231 and a first shoveling plate 232. The wall body of the first heating pipe 231 is provided with a plurality of first air outlet holes 20. The first heating tube 231 is, for example, a circular tube. The first air outlet holes 20 are distributed in several radial and axial directions along the first heating pipe 231. The first shoveling plate 232 is mounted on the outer wall of the first heating pipe 231, and may be welded.
The wind speed of the hot air in the first heating pipe 231 is 6 to 18m/s.
Referring to fig. 2, a wall of the first heating pipe assembly 23 between two adjacent first louvers 232 is provided with a plurality of first air outlet holes 20.
The first heating pipe 231 is configured to extend into the drum 5, and wind is blown out from the first air outlet hole 20 formed at the downstream end of the first heating pipe assembly 23, and enters the drum 5.
Referring to fig. 2, the aperture of the first air outlet hole 20 is smaller than 20mm, reducing the probability of heating material entering the first heating pipe 231 through the first air outlet hole 20.
In some embodiments, the sum of the cross-sectional areas of all the first air outlet holes 20 is 1.5 to 2.5 times the ventilation cross-sectional area of the first heating pipe 231, so that even the control of the hot air blown out from the first air outlet holes 20 within a certain wind speed range is ensured, and the entry of the material with larger size into the first heating pipe 231 through the first air outlet holes 20 is avoided, and the generation of larger noise due to the overlarge wind speed is avoided.
With continued reference to fig. 2, the central axis of each first air outlet hole 20 is perpendicular to the central axis of the first heating duct 231. The structure ensures that hot air can be blown against the material, is favorable for being blown into the pores between the materials, and improves the heat transfer area and the mass transfer area between the hot air and the material, thereby improving the drying effect.
Referring to fig. 2, the number of the first copy plates 232 is plural, the plurality of first copy plates 232 are arranged along the circumferential direction of the first heating pipe 231, and the plane of each first copy plate 232 passes through the central axis of the first heating pipe 231. Specifically, 4 or more than 4 first shoveling plates 232 are uniformly distributed in the circumferential direction of the first heating pipe 231 to drive the material to roll and throw.
One end of the first connecting tube 22 is nested with one end of the first heating tube 231. The first heating tube assembly 23 further comprises a first sealing plate 233, wherein the first sealing plate 233 is disposed in the first heating tube 231 and is positioned at the nesting position of the first heating tube 231 and the first connecting tube 22; the first sealing plate 233 is fixedly connected to the first heating pipe 231, and may be specifically fixed to the first heating pipe 231 by a pressing plate 234 and a fastener (such as a bolt) 235. The pressing plate 234 includes two pieces, and one of the pressing plates 234 is welded to the first heating pipe 231. The first sealing plate 233 is clamped between the two pressing plates 234, and bolts penetrate through the two pressing plates and the first sealing plate 233 to fix the first sealing plate 233 and the first heating pipe 231. The first sealing plate 233 is bent toward the inner wall of the first heating pipe 231; the first sealing plate 233 is configured to be elastic, and the first sealing plate 233 abuts against the outer wall of the first connection pipe 22 under its own elastic force.
During the operation of the dryer, the first heating pipe 231 rotates with the rotation of the drum 5. The hot air flows from the first connection pipe 22 to the first heating pipe 231, and the hot air in the first heating pipe 231 is always in a positive pressure state by the fan 1, so that the first sealing plate 233 is pushed out of the first heating pipe 231. The first sealing plate 233 is bent toward the inside of the first heating pipe 231, and increases its adhesion force toward the outer wall of the first connection pipe 22 under the action of the hot wind pressure. Moreover, as the first sealing plate 233 is worn during operation, the first sealing plate 233 is always guaranteed to be attached to the outer wall of the first connecting pipe 22 under the action of hot air pressure, so that hot air leakage in the first heating pipe 231 is reduced and even permanently avoided.
Returning to fig. 1, the second branch 3 includes a second air duct 31, a second connection tube 32, and a second heating tube assembly 33. One end of the second air duct 31 is in fluid communication with the fan 1. One end of the second connection pipe 32 is in fluid communication with the other end of the second air duct 31. The pipe diameter of the second connecting pipe 32 is smaller than that of the second heating pipe assembly 33, and one end of the second connecting pipe 32 is sleeved at one end of the second heating pipe 331 and is dynamically sealed. During operation of the apparatus, the second connection tube 32 is stationary and the second heating tube assembly 33 rotates with the rotation of the drum 5. And, the center of rotation of the second heating tube assembly 33 coincides with the center of rotation of the drum 5. Sealing filler is arranged at the sleeving position of the two to prevent hot air in the hot air system from escaping when the equipment operates.
Referring to fig. 1, a second damper 34 may be installed inside the second duct 31 to control on and off of the second branch 3.
The second heating tube assembly 33 is in fluid communication with the other end of the second connecting tube 32 at the end of the second heating tube assembly 33 or at a second through hole 330 formed in the wall adjacent to the end of the second heating tube assembly 33. Wherein, the wall of the second heating tube assembly 33 is provided with a plurality of second air outlet holes 30.
Referring to fig. 1 and 3, one end of the second connection pipe 32 is nested with one end of the second heating pipe 331. The second heating tube assembly 33 further comprises a second sealing plate (not shown) disposed in the second heating tube 331 and positioned at a nesting position of the second heating tube 331 and the second connecting tube 32; the second sealing plate is fixedly connected with the second heating pipe 331 and bends towards the inner wall of the second heating pipe 331; the second sealing plate is configured to be elastic, and the second sealing plate abuts against the outer wall of the second connection pipe 32 under its own elastic force.
Referring to fig. 2, the second heating tube assembly 33 includes a second heating tube 331 and a second louver 332. The wall body of the second heating tube 331 is provided with a plurality of second air outlet holes 30. The second heating tube 331 is, for example, a circular tube. The second air outlet holes 30 are distributed in several along the axial direction and the radial direction of the second heating tube 331. The second shoveling plate 332 is mounted on the outer wall of the second heating tube 331, and may be specifically welded.
Referring to fig. 2, the aperture of the second air outlet 30 is smaller than 20mm, so that the probability that the heating material enters the second heating tube 331 through the second air outlet 30 is reduced.
In some embodiments, the sum of the cross-sectional areas of all the second air outlet holes 30 is 1.5 to 2.5 times the ventilation cross-sectional area of the second heating tube 331, so that even the hot air blown out from the second air outlet holes 30 is ensured to be controlled within a certain wind speed range, and larger-sized materials are prevented from entering the second heating tube 331 through the second air outlet holes 30, and larger noise generated by excessive wind speed is avoided.
With continued reference to fig. 2, the central axis of each second air outlet 30 is perpendicular to the central axis of the second heating tube 331. The structure ensures that hot air can be blown against the material, is favorable for being blown into the pores between the materials, and improves the heat transfer area and the mass transfer area between the hot air and the material, thereby improving the drying effect.
The second shoveling plates 332 are multiple in number, the second shoveling plates 332 are arranged along the circumferential direction of the second heating tube assembly 33, and the plane of each second shoveling plate 332 passes through the central axis of the second heating tube assembly 33. Specifically, 4 or more second shoveling plates 332 are uniformly distributed in the circumferential direction of the second heating tube 331 to drive the material to roll and throw.
One end of the second connection pipe 32 is nested with one end of the second heating pipe 331. The second heating tube assembly 33 further comprises a second sealing plate, which is disposed in the second heating tube 331 and is located at a nesting position of the second heating tube 331 and the second connecting tube 32; the second sealing plate is fixedly connected with the second heating pipe 331 and bends towards the inner wall of the second heating pipe 331; the second sealing plate is configured to be elastic, and the second sealing plate abuts against the outer wall of the second connection pipe 32 under its own elastic force.
During the operation of the dryer, the second heating tube 331 rotates with the rotation of the dryer drum 5. The hot air flows from the second connection pipe 32 to the second heating pipe 331, and the hot air in the second heating pipe 331 is always in a positive pressure state under the action of the fan 1, so that the second sealing plate is pushed out of the second heating pipe 331. The second sealing plate is bent towards the inside of the second heating tube 331, and the adhesion force of the second sealing plate to the outer wall of the second connecting tube 32 is increased under the action of hot wind pressure. And, along with the operation wearing and tearing of second closing plate, ensure the laminating of second closing plate on the outer wall of second connecting pipe 32 all the time under the effect of hot wind pressure, reduce and even lasting hot air leakage in the avoiding second heating pipe 331.
With continued reference to fig. 2, the central axes of the first heating tube 231 and the second heating tube 331 coincide, and the respective central axes are all inclined. The central axes of the first heating pipe 231 and the second heating pipe 331 may coincide with the central axis of the drum 5. This allows both the first heating tube 231 and the second heating tube 331 to rotate in synchronization with the drum 5.
With continued reference to fig. 2, the first heating pipe 231 and the second heating pipe 331 are integrated, and a partition plate 25 is installed at the junction of the first heating pipe 231 and the second heating pipe 331 to separate the fluids in the first heating pipe 231 and the second heating pipe 331. This arrangement makes the structure of the hot air system more compact.
In other embodiments, the first heating tube 231 and the second heating tube 331 are separated with a certain distance therebetween. The first heating pipe 231 is used to supply air to the upstream end of the drum 5, and the second heating pipe 331 is used to supply air to the downstream end of the drum 5.
The downstream end of the first branch 2 is configured to extend into a central position in the length direction of the drum 5. Specifically, the downstream end of the first heating pipe 231 extends into the middle position in the longitudinal direction of the drum 5.
In the downstream mode, the air is heated by the heater 4 to obtain hot air, and the hot air is blown into the roller 5 through the first connecting pipe 22, the first heating pipe 231 and the first air outlet 20 on the first heating pipe 231 of the first branch 2 under the action of the fan 1. After the hot air fully contacts with the materials in the roller 5 for heat mass exchange, the hot air containing the water vapor evaporated from the materials is discharged out of the device from the discharge end of the roller 5 through the moisture discharging system.
In the concurrent mode, the first heating pipe 231 receives the material at the center of the roller 5, so that the free falling distance and speed of the material are shortened, and the impact force between the material and the wall of the roller 5 is greatly reduced and the breakage of the material is reduced under the effect that hot air is blown against the material; the sorting among the materials is changed by continuously rolling the materials in each throwing process, the materials close to the cylinder wall and the cylinder 5 shoveling plate are heated in the lifting process of the materials, and the materials on the heating pipe are heated close to the heating pipe, so that the materials of all parts are heated more uniformly, the multi-rolling heating continuity is better, and the drying effect is improved.
The downstream end of the second branch 3 is configured to extend into an intermediate position in the length direction of the drum 5. Specifically, the downstream end of the second heating tube 331 extends into the middle of the drum 5 in the length direction.
In the countercurrent mode, the air is heated by the heater 4 to obtain hot air, and the hot air is blown into the roller 5 through the second connecting pipe 32, the second heating pipe 331 and the second air outlet 30 on the second heating pipe 331 of the second branch 3 under the action of the fan 1. After the hot air fully contacts with the materials in the roller 5 for heat mass exchange, the hot air containing the water vapor evaporated from the materials is discharged out of the equipment from the feeding end of the roller 5 through the moisture discharging system.
In the countercurrent mode, the second heating pipe 331 receives the material at the center of the roller 5, shortens the free falling distance and speed of the material, and greatly reduces the impact force between the material and the wall of the roller 5 under the effect that hot air is blown against the material, so that the breakage of the material is reduced; the sorting among the materials is changed by continuously rolling the materials in each throwing process, the materials close to the cylinder wall and the cylinder 5 shoveling plate are heated in the lifting process of the materials, and the materials on the heating pipe are heated close to the heating pipe, so that the materials of all parts are heated more uniformly, the multi-rolling heating continuity is better, and the drying effect is improved.
The other working mode is alternating forward flow mode and backward flow mode. The forward flow mode may be performed first, or the reverse flow mode may be performed first. The mode can give consideration to the advantages of the forward flow mode and the backward flow mode, so that the working modes of the dry materials are more abundant and various.
In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present utility model.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (18)
1. A hot air system for a dryer, the hot air system comprising:
a fan (1);
-a first branch (2) downstream of the fan (1) and in fluid communication with the fan (1); a first air outlet hole (20) is formed in the wall body at the downstream of the first branch (2); and
-a second branch (3) downstream of the fan (1) and in fluid communication with the fan (1); the wall body at the downstream of the second branch (3) is provided with a second air outlet hole (30);
wherein the first branch (2) and the second branch (3) are independent; the bending direction of the first branch (2) is opposite to the bending direction of the second branch (3), and the downstream end of the first branch (2) and the downstream end of the second branch (3) are fixed.
2. The hot air system according to claim 1, characterized in that the first branch (2) comprises:
a first air duct (21), one end of which is in fluid communication with the fan (1);
a first connecting pipe (22), one end of which is in fluid communication with the other end of the first air pipe (21); and
a first heating pipe assembly (23) which is in fluid communication with the other end of the first connecting pipe (22) and is dynamically sealed, wherein the communication position is the end part of the first heating pipe assembly (23), or the communication position is a first through hole (230) formed in the wall body adjacent to the end part of the first heating pipe assembly (23);
wherein, a plurality of first air outlet holes (20) are formed in the wall body of the first heating pipe component (23).
3. The hot air system according to claim 2, wherein the first heating tube assembly (23) comprises:
the wall body of the first heating pipe (231) is provided with a plurality of first air outlet holes (20); -said first heating tube (231) and said first connecting tube (22) are in dynamic sealing and fluid communication; and
and a first shoveling plate (232) mounted on the outer wall of the first heating pipe (231).
4. A hot air system according to claim 3, characterized in that one of the ends of the first connecting tube (22) is nested with one of the ends of the first heating tube (231); the first heating tube assembly (23) further comprises:
a first sealing plate (233) disposed within the first heating tube (231) and located at a nesting position of the first heating tube (231) and the first connecting tube (22); the first sealing plate (233) is fixedly connected with the first heating pipe (231) and bends towards the inner wall of the first heating pipe (231); the first sealing plate (233) is configured to be elastic, and the first sealing plate (233) abuts against the outer wall of the first connecting pipe (22) under self elastic force.
5. A hot air system according to claim 3, characterized in that the sum of the cross-sectional areas of all the first air outlet openings (20) is 1.5-2.5 times the ventilation cross-sectional area of the first heating duct (231).
6. A hot air system according to claim 3, characterized in that the central axis of each first air outlet opening (20) is perpendicular to the central axis of the first heating duct (231).
7. A hot air system according to claim 3, characterized in that the second branch (3) comprises:
a second air duct (31), one end of which is in fluid communication with the fan (1);
a second connection pipe (32) having one end in fluid communication with the other end of the second air duct (31); and
a second heating tube assembly (33) in fluid communication with the other end of the second connecting tube (32) and positioned at the end of the second heating tube assembly (33), or positioned at a second through hole (330) formed in the wall adjacent to the end of the second heating tube assembly (33);
wherein, a plurality of second air outlet holes (30) are arranged on the wall body of the second heating pipe component (33).
8. The hot air system according to claim 7, wherein the second heating tube assembly (33) comprises:
the wall body of the second heating pipe (331) is provided with a plurality of second air outlet holes (30), and the second heating pipe (331) and the second connecting pipe (32) are in dynamic sealing and fluid communication; and
and a second shoveling plate (332) mounted on the outer wall of the second heating pipe (331).
9. The hot air system according to claim 8, characterized in that one of the ends of the second connecting tube (32) is nested with one of the ends of the second heating tube (331); the second heating tube assembly (33) further comprises:
the second sealing plate is arranged in the second heating pipe (331) and is positioned at a nesting position of the second heating pipe (331) and the second connecting pipe (32); the second sealing plate is fixedly connected with the second heating pipe (331) and bends towards the inner wall of the second heating pipe (331); the second sealing plate is configured to be elastic, and the second sealing plate abuts against the outer wall of the second connecting pipe (32) under self elastic force.
10. The hot air system according to claim 7, characterized in that the sum of the cross-sectional areas of all the second air outlet openings (30) is 1.5-2.5 times the ventilation cross-sectional area of the second heating duct (331).
11. The hot air system according to claim 7, characterized in that the central axis of each second air outlet opening (30) is perpendicular to the central axis of the second heating duct (331).
12. The hot air system according to claim 8, characterized in that the central axes of the first heating pipe (231) and the second heating pipe (331) coincide and the respective central axes are all inclined.
13. The hot air system according to claim 8, characterized in that the first heating pipe (231) and the second heating pipe (331) are integral, and that a partition plate (25) is mounted at the junction of the first heating pipe (231) and the second heating pipe (331) to separate the fluids within the first heating pipe (231) and the second heating pipe (331).
14. A hot air system according to claim 3, wherein the number of the first shoveling plates (232) is plural, the plural first shoveling plates (232) are arranged along the circumferential direction of the first heating pipe (231), and the plane of each first shoveling plate (232) passes through the central axis of the first heating pipe (231).
15. The hot air system according to claim 14, wherein a wall of the first heating tube assembly (23) between two adjacent first louvers (232) is provided with a plurality of first air outlet holes (20).
16. The hot air system according to claim 8, wherein the number of the second louvers (332) is plural, the plural second louvers (332) are arranged along the circumferential direction of the second heating pipe (331), and the plane in which each of the second louvers (332) is located passes through the central axis of the second heating pipe (331).
17. The hot air system according to claim 8, wherein the wall of the second heating tube assembly (33) between two adjacent second louvers (332) is provided with a plurality of second air outlet holes (30).
18. The hot air system according to claim 1, characterized in that the downstream end of the first branch (2) and/or the downstream end of the second branch (3) is configured to extend into a middle position in the length direction of the drum (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320341526.0U CN219390419U (en) | 2023-02-28 | 2023-02-28 | Hot air system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320341526.0U CN219390419U (en) | 2023-02-28 | 2023-02-28 | Hot air system |
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| Publication Number | Publication Date |
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| CN219390419U true CN219390419U (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320341526.0U Active CN219390419U (en) | 2023-02-28 | 2023-02-28 | Hot air system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116105476A (en) * | 2023-02-28 | 2023-05-12 | 厦门烟草工业有限责任公司 | Dryer and drying method thereof |
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2023
- 2023-02-28 CN CN202320341526.0U patent/CN219390419U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116105476A (en) * | 2023-02-28 | 2023-05-12 | 厦门烟草工业有限责任公司 | Dryer and drying method thereof |
| CN116105476B (en) * | 2023-02-28 | 2024-08-30 | 厦门烟草工业有限责任公司 | Dryer and drying method thereof |
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