Hot air treatment device and hot air treatment device supply unit

Abstract

The present invention provides a hot air processing apparatus and a hot air processing apparatus supply unit that prevent spillage of materials to be processed, such as tea leaves, and that can suppress the need to increase the size of the screw. [Solution] The processing cylinder 3 has a cylindrical body 31 and a head plate 32 fixed without gap to one end of the body 31, and rotates around the center of the body 31 as an axis, a screw hopper 6, a hot air supply mechanism 7 that supplies hot air into the processing cylinder 3 from one end, and a removal mechanism 8 that removes the tea leaves processed by the hot air inside the processing cylinder 3 from the other end of the processing cylinder 3. The screw hopper 6 has a screw 622 that rotates coaxially with the processing cylinder 3, and a screw feeder 62 that penetrates the head plate 32 and has a tea leaf supply opening 6a formed at its tip located inside the processing cylinder 3. The hot air supply mechanism 7 has a hot air outlet 7a that blows hot air into the processing cylinder 3 and opens on the outer circumference of the screw feeder 62.

Description

Technical Field

[0001] The present invention relates to a hot air treatment device for supplying hot air to a rotating treatment cylinder to promote drying of an object to be treated such as tea leaves by heat treatment, and a supply unit of the hot air treatment device.

Background Art

[0002] For example, polished green tea is manufactured by performing each step of steaming, cooling loose tea, drying, separating, and finish drying. The drying is carried out in a polished green tea furnace that dries tea leaves conveyed by a conveying means such as a conveyor by radiative heat transfer and natural convection heat transfer, or a polished green tea furnace (continuous convection heat transfer dryer) that dries by forcibly ventilating hot air. The applicant of the present application has proposed a hot air treatment device that is disposed in front of this polished green tea furnace and dries with high-temperature hot air (see, for example, Patent Document 1 and Patent Document 2, etc.). Note that this hot air treatment device is not limited to the use form disposed in front of the polished green tea furnace, and can also be used for utilization as a tea leaf killing green device, drying of powdered tea, drying for suppressing the load of the kneading and drying process, etc. Furthermore, it is applicable to drying of leafy vegetables etc. other than tea leaves.

[0003] The hot air treatment device described in Patent Document 1 includes a treatment cylinder that is cylindrical and rotates about a substantially horizontal axis, a screw conveyor that has a hopper for charging tea leaves and supplies the tea leaves to the treatment cylinder, and a hot air blowing pipe that supplies hot air sent from a hot air generating means to the treatment cylinder. A thrust bearing fixed to the frame is disposed on one end side of the treatment cylinder, and the hot air blowing pipe is fixed to the thrust bearing in a state where it is inserted into the treatment cylinder at the center of the thrust bearing. The screw conveyor is provided above the hot air blowing pipe, and a supply port for supplying tea leaves to the treatment cylinder is inserted into the treatment cylinder from the thrust bearing.

[0004] In the hot air processing apparatus described in Patent Document 1, tea leaves supplied to a rotating processing cylinder are sent to the other end by hot air supplied from a hot air generating means, while drying and degreening are promoted, and then removed by the removal mechanism. As mentioned above, since the end plate is fixed to the frame, a gap is required between it and the rotating processing cylinder (outer circumference of the processing cylinder). Therefore, there is a problem that tea leaves spill out through this gap.

[0005] While measures such as using sealing materials to eliminate gaps can be considered, the peripheral speed is high at the outer circumference of the processing cylinder, making the sealing material prone to wear. Furthermore, the sealing effect is not fully achieved towards the outer circumference due to runout and other factors. Tea leaves tend to accumulate at the bottom of the processing cylinder, and in particular, tea leaves are prone to spilling from the gap between the processing cylinder and the end plate located at the bottom, making it difficult to effectively prevent tea leaf spillage.

[0006] On the other hand, the hot air processing apparatus described in Patent Document 2 comprises a hot air blowing pipe inserted into the processing cylinder from one end along the rotation axis of the processing cylinder, and a tea leaf feeding device in which a supply port for supplying tea leaves into the processing cylinder is provided on the outer circumference of the hot air supply pipe, inserted from the end plate at one end. The hot air blowing pipe is fixed to the processing cylinder by fasteners and rotates together with the processing cylinder. The tea leaf feeding device comprises a hopper and a screw that rotates coaxially with the processing cylinder. The screw is provided on the outer circumference of the hot air supply pipe that sends hot air to the hot air blowing pipe, and the tea leaves put into the hopper are supplied into the processing cylinder from the supply port by the screw. In the hot air processing apparatus described in Patent Document 2, since the rotating processing cylinder is composed of a cylindrical body and an end plate fixed without gap to one end of the body, it is possible to prevent tea leaves from spilling out from between the body and the end plate. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2013-034405 [Patent Document 2] Japanese Patent Publication No. 2021-058172 [Overview of the project] [Problems that the invention aims to solve]

[0008] However, in the hot air processing apparatus described in Patent Document 2, the screw that sends tea leaves to the supply port is located on the outer circumference of the hot air supply pipe, so the screw has a diameter larger than the hot air supply pipe, inevitably resulting in a large screw. A large screw is not only difficult to manufacture, but the higher peripheral speed makes it more likely to break the tea leaves, which may lead to a decline in quality. Furthermore, in addition to the large size of the screw and the resulting increase in weight, the hot air processing apparatus described in Patent Document 2 is configured so that the screw must be removed after removing the hot air blowing pipe, making it difficult to attach and detach in case of trouble.

[0009] One possible solution is to reduce the diameter of the hot air inlet and supply pipes to miniaturize the screw. However, if the wind speed of the hot air supplied from the inlet is too high, the tea leaves will be blown away, making it difficult to ensure the desired residence time for drying. Therefore, in order to use the necessary airflow and maintain a wind speed that ensures the desired residence time for the tea leaves, a certain area for the hot air to be blown out is required, making it difficult to reduce the diameter of the hot air inlet and supply pipes.

[0010] Based on the above, the object of the present invention is to provide a hot air processing apparatus and a hot air processing apparatus supply unit that can prevent spillage of materials to be processed, such as tea leaves, and can suppress the need to increase the size of the screw. [Means for solving the problem]

[0011] The first means of the hot air processing apparatus of the present invention comprises a processing cylinder having a cylindrical body and an end plate fixed without gap to one end of the body, and rotating around the center of the body as an axis, A material supply mechanism that supplies the material to be processed into the processing cylinder from one end using a screw feeder having a screw, A hot air supply mechanism having a hot air generating means, which supplies the hot air sent from the hot air generating means into the processing cylinder from one end, The device includes a removal mechanism for removing the object to be processed by the hot air inside the processing cylinder from the other end of the processing cylinder, The material supply mechanism is such that the screw rotates coaxially with the processing cylinder, and the screw feeder penetrates the end plate, with a material supply port formed at its tip located inside the processing cylinder. The hot air supply mechanism is a hot air processing apparatus characterized in that a hot air outlet for blowing hot air into the processing cylinder is opened on the outer circumference of the screw feeder.

[0012] Here, the material to be processed is not particularly limited and may be tea leaves, powdered tea, or leafy vegetables. Furthermore, the processing cylinder may be such that the main body and the end plate are seamlessly integrated by screw fastening or the like, or the main body and the end plate may be formed as a single unit.

[0013] The processing cylinder in the first means has a cylindrical body and a disc fixed without gap to one end of the body. This prevents spillage of the material to be processed, such as tea leaves, from between the body and the disc. Furthermore, the hot air outlet opens to the outer circumference of the screw feeder. This allows for an increase in the area of ​​the hot air outlet without increasing the size of the screw. In other words, the area of ​​the hot air outlet can be set so that the air velocity is sufficient to ensure that the material to be processed, such as tea leaves, remains in the processing cylinder for a sufficient amount of time, without increasing the size of the screw.

[0014] The second means in the hot air processing apparatus of the present invention is that, in the first means, the hot air supply mechanism has a hot air outlet cylinder that penetrates the end plate and whose tip, where the hot air outlet is formed, is located inside the processing cylinder, The hot air outlet cylinder is slidably connected to the end plate via a sealing material.

[0015] Compared to the bottom of the processing cylinder where tea leaves and other materials tend to accumulate, the area between the hot air blowing cylinder and the end plate is less prone to spillage of processed materials such as tea leaves, and the peripheral speed is also lower, resulting in less wear on the sealing member. Therefore, according to the second means, by adopting a configuration in which the two components are slidably connected via the sealing material, spillage of processed materials such as tea leaves from the connection portion between the hot air blowing cylinder and the end plate can be effectively suppressed.

[0016] The third means in the hot air processing apparatus of the present invention is that, in the first means or the second means, the material to be processed supply port is located on the other end side of the processing cylinder, relative to the hot air outlet. That is, the material to be processed supply port is located on the inner side of the processing cylinder, relative to the hot air outlet.

[0017] In the hot air processing apparatus described in Patent Document 1, a hot air inlet is positioned below the supply port for supplying tea leaves to the processing cylinder, causing the tea leaves supplied from the supply port to fall into the hot air inlet. In contrast, the hot air processing apparatus described in Patent Document 2 has a configuration in which the hot air inlet is located in front of the tea leaf supply port (on the other end of the processing cylinder). In both cases, there is something that obstructs (hinders) the supply of tea leaves, etc., to the processing cylinder. In contrast, according to the third means, the supply port for the material to be processed is located on the other end of the processing cylinder, further than the hot air outlet, and there is nothing that obstructs the supply of the material to be processed, such as tea leaves, into the processing cylinder. Therefore, it is possible to smoothly supply the material to be processed, such as tea leaves, into the processing cylinder.

[0018] A fourth means in the hot air treatment apparatus of the present invention is that, in the first means or the second means, the hot air supply mechanism has a blocking member that partially blocks the hot air outlet.

[0019] According to the fourth means, for example, by providing the blocking member on the upper part of the hot air outlet, it is possible to suppress the upward bias of the hot air being blown out, and thus to properly adjust the direction of the hot air being blown out.

[0020] The supply unit of the hot air treatment device in the present invention has a cylindrical main body and a platen fixed to one end side of the main body without a gap, and supplies an object to be treated and hot air to a treatment cylinder that rotates about the center of the main body. The supply unit of the hot air treatment device is as follows: An object to be treated supply mechanism that supplies an object to be treated into the treatment cylinder from one end side by a screw feeder having a screw; A hot air supply mechanism having a hot air generation means and supplying the hot air sent from the hot air generation means into the treatment cylinder from one end side, and The object to be treated supply mechanism is such that the screw rotates coaxially with the treatment cylinder, and the screw feeder penetrates the platen and the tip is located inside the treatment cylinder. The hot air supply mechanism is characterized in that a hot air outlet for blowing hot air into the treatment cylinder is provided on an outer peripheral portion of the screw feeder.

[0021] According to the supply unit of the hot air treatment device of the present invention, a supply unit applicable to the hot air treatment device of the present invention can be provided.

Effects of the Invention

[0022] According to the present invention, it is possible to provide a hot air treatment device and a supply unit of the hot air treatment device that can prevent spillage of an object to be treated such as tea leaves and suppress enlargement of the screw.

Brief Description of the Drawings

[0023] [Figure 1] It is a front view of a hot air treatment device showing an embodiment of the present invention. [Figure 2] It is a side view of the hot air treatment device shown in FIG. 1 as viewed from one end side. [Figure 3] It is a cross-sectional view taken along line A-A of the hot air treatment device shown in FIG. 2. [Figure 4] It is a perspective view of the supply unit main body that becomes a connection portion with the platen in the supply unit shown in FIGS. 1 to 3, extracted and viewed obliquely from above the other end side. [Figure 5]Figure 4 is a front view of the supply unit itself. [Figure 6] Figure 4 is a side view of the main body of the supply unit. [Figure 7] This figure shows a magnified view of area B, which is enclosed by a dashed circle in Figure 3. [Modes for carrying out the invention]

[0024] Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the invention will be described using as an example an application in which the device is placed between a steamer and a matcha furnace in a matcha production line and used to dry tea leaves with high-temperature hot air. The hot air processing device and the hot air processing device supply unit of the present invention can also be used in applications where tea leaves are processed after the steaming process in a green tea production line, or where the steaming process is omitted and the processing is performed in a manner that kills the green color and dries the leaves. Furthermore, it can also be used for drying powdered tea and leafy vegetables.

[0025] Figure 1 is a front view of a hot air treatment apparatus 10 showing one embodiment of the present invention. In Figure 1, the left side of the hot air treatment apparatus 10 is one end, and the right side is the other end. Figure 2 is a side view of the hot air treatment apparatus 10 shown in Figure 1, viewed from one end. Figure 3 is a cross-sectional view of the hot air treatment apparatus 10 shown in Figure 2, taken along line AA.

[0026] As shown in Figures 1 to 3, the hot air processing apparatus 10 of this embodiment comprises a frame 2 installed on the floor, a processing cylinder 3 (see Figure 3) installed extending horizontally from the frame 2, a supply unit 5 provided on one end of the processing cylinder 3, and a removal mechanism 8 provided on the other end of the processing cylinder 3. The processing cylinder 3 is covered by a cover 4. The supply unit 5 consists of a screw hopper (processing material supply mechanism) 6 that supplies tea leaves (material to be processed) into the processing cylinder 3 from one end, and a hot air supply mechanism 7 that supplies hot air into the processing cylinder 3 from the other end.

[0027] As shown in Figure 3, the processing cylinder 3 has a cylindrical body 31 and an end plate 32. The end plate 32 is a donut-shaped plate and is fixed to one end of the body 31 without any gaps by screws or the like. The body 31 and the end plate 32 are made of stainless steel, for example, with a thickness of about 1.5 mm to 5.0 mm. The other end of the body 31 is open, and as will be described in detail later, the tea leaves supplied into the processing cylinder 3 from one end are sent to the other end and fall into the extraction mechanism 8 through the opening 3a on the other end. The processing cylinder 3 is mounted on the frame 2 so as to be rotatable around the center of the body 31, and as shown in Figure 1, it is rotated by processing cylinder motors M1, M1 provided on one end and the other end, respectively. The rotation speed of the processing cylinder 3 can be adjusted steplessly, for example, up to about 30 rpm. As mentioned above, since the processing cylinder 3 has a cylindrical body 31 and a cap plate 32 fixed to it without any gaps, it is possible to prevent tea leaves from spilling out, even at the connection part 311 located at the bottom where tea leaves tend to accumulate, between the body 31 and the cap plate 32.

[0028] The screw hopper 6 comprises a hopper 61 having a tea leaf inlet 61a (see Figure 5) and a screw feeder 62 having a screw 622. The screw 622 rotates coaxially with the processing cylinder 3 by a screw motor M2 (see Figure 1). A tea leaf supply pipe 621 penetrates the end plate 32, and a tea leaf supply inlet (processing material supply inlet) 6a formed at its tip is located inside the processing cylinder 3. Tea leaves fed into the hopper 61 are supplied into the processing cylinder 3 from the tea leaf supply inlet 6a by the screw 622. In other words, tea leaves are supplied into the processing cylinder 3 from one end.

[0029] The hot air supply mechanism 7 comprises a hot air generating means 71 consisting of a blower fan 711 and a burner 712, a hot air supply pipe 72, and a hot air outlet cylinder 73 with a hot air outlet 7a formed at its tip. The hot air generating means 71 can generate hot air at a temperature of approximately 150°C to 400°C, and the hot air temperature and airflow rate are adjustable. In this embodiment, the hot air outlet cylinder 73 penetrates the end plate 32, and its tip, with the hot air outlet 7a formed therein, is located inside the processing cylinder 3. As shown by the arrows in Figure 3, the hot air generated by the hot air generating means 71 is sent through the hot air supply pipe 72 to the hot air outlet cylinder 73 and blown into the processing cylinder 3 from the hot air outlet 7a. In other words, hot air is supplied into the processing cylinder 3 from one end. The dashed line of the arrow indicates the flow of hot air passing behind the screw feeder 62.

[0030] Figure 4 is a perspective view of the supply unit body 51, which is the connection point with the end plate 32 in the supply unit 5 shown in Figures 1 to 3, taken from diagonally above the other end. Figure 5 is a front view of the supply unit body 51 shown in Figure 4, and Figure 6 is a side view of the supply unit body 51 shown in Figure 4. Figure 6 is a view of the supply unit body 51 from the other end.

[0031] As shown in Figures 4 and 6, the hot air outlet 7a that blows hot air into the processing cylinder 3 is opened on the outer circumference of the tea leaf supply pipe 621 (screw feeder). Therefore, the area of ​​the hot air outlet 7a can be increased without increasing the size of the screw 622. In other words, the area of ​​the hot air outlet 7a can be set so that the air velocity is sufficient to ensure that the tea leaves remain in the processing cylinder 3 for a sufficient amount of time, without increasing the size of the screw 622. In this embodiment, the hot air outlet 7a is divided into multiple sections (six in the figures) by connecting ribs 75 that connect the tea leaf supply pipe 621 and the hot air outlet cylinder 73. In this embodiment, a blocking member 74 is provided on the upper part of the tea leaf supply pipe 621 to partially block the hot air outlet 7a. This blocking member 74 is a member that adjusts the direction in which the hot air is blown into the processing cylinder 3.

[0032] As shown in Figures 4 and 5, the tip of the tea leaf supply pipe 621 is located on the other end side of the tip of the hot air blowing cylinder 73. That is, the tea leaf supply port 6a formed at the tip of the tea leaf supply pipe 621 is located on the other end side of the processing cylinder 3 than the hot air outlet 7a formed at the tip of the hot air blowing cylinder 73. As a result, there are no obstacles when tea leaves are supplied into the processing cylinder 3 from the tea leaf supply port 6a, and the tea leaves can be supplied into the processing cylinder 3 smoothly. In this embodiment, the tip of the screw 622 is configured to protrude on the other end side of the tip of the tea leaf supply pipe 621 (tea leaf supply port 6a).

[0033] As shown in Figures 1 to 3, the extraction mechanism 8 comprises a chute 81, a rotary valve 82 provided at the lower end of the chute 81, an exhaust fan 83 provided at the upper end of the chute 81, and an exhaust fan cyclone 84 connected to the exhaust fan 83. Tea leaves sent to the other end of the processing cylinder 3 fall from the other end opening 3a and are extracted by the rotary valve 82. The tea leaves extracted from the rotary valve 82 are transported to the next process (for example, a matcha furnace) by a conveyor or the like. The hot air supplied into the processing cylinder 3 is exhausted by the exhaust fan 83 and processed by the exhaust fan cyclone 84.

[0034] Figure 7 is an enlarged view of section B, enclosed by the dashed circle in Figure 3. In other words, Figure 7 is a cross-sectional view showing the connection between the hot air outlet cylinder 73 and the end plate 32.

[0035] As shown in Figure 7, a sealing material 732 made of, for example, a heat-resistant material is attached to the hot air outlet cylinder 73 by a sealing retainer 731. On the other hand, a connecting plate 321 made of, for example, metal is provided on the end plate 32 in a position that it abuts against the sealing material 732. In other words, the hot air outlet cylinder 73 and the end plate 32 are slidably connected via the sealing material 732. This effectively prevents tea leaves from spilling from the connection between the hot air outlet cylinder 73 and the end plate 32.

[0036] Next, an example of the operation mode of the hot air treatment device 10 will be described.

[0037] First, the processing cylinder motors M1, M1 and the screw motor M2 are driven to rotate the processing cylinder 3 and the screw 622. Next, the blower fan 711 and the exhaust fan 83 are driven, and then the burner 712 is ignited. Once the temperature of the hot air from the hot air generating means 71 has stabilized to, for example, about 350°C, the tea leaves transported from the steamer or the like are fed into the hopper 61 through the inlet 61a. Note that the screw 622 does not need to be rotated at the same time as the processing cylinder 3; it only needs to be rotated before the tea leaves are fed in.

[0038] The tea leaves fed into the hopper 61 are supplied to the processing cylinder 3 from the tea leaf supply port 6a by the screw 622. The tea leaves supplied to the processing cylinder 3 are dried by the hot air blown out from the hot air outlet 7a (see arrow in Figure 3) while rotating inside the processing cylinder 3, and are sent to the other end and removed from the rotary valve 82 at the other end.

[0039] As mentioned above, the hot air outlet 7a that blows hot air into the processing cylinder 3 is located on the outer circumference of the tea leaf supply pipe 621. Therefore, without increasing the size of the screw 622, the area of ​​the hot air outlet 7a can be set so that the airflow velocity is such that a desired time (for example, about 2 to 3 minutes) for the tea leaves to remain in the processing cylinder 3 can be ensured using a predetermined amount of hot air. In other words, it is possible to prevent problems such as the tea leaves being blown to the other end due to an excessively high airflow velocity, making it impossible to ensure the desired retention time in the processing cylinder 3. The predetermined amount of hot air is set according to the size of the processing cylinder 3, the amount of tea leaves to be supplied, etc.

[0040] Furthermore, in this embodiment, a blocking member 74 is provided on the upper part of the tea leaf supply pipe 621 to partially block the hot air outlet 7a. This prevents the problem of the hot air blown out from the hot air outlet 7a being biased towards the upper part of the processing cylinder 3. Note that the blocking member 74 is not essential, and even if a blocking member 74 is provided, its position and range are not limited to the upper part of the tea leaf supply pipe 621. It is sufficient to adjust the direction of airflow to be appropriate (for example, not biased towards the upper or lower side, or to the right or left side) according to the characteristics of the hot air blown out from the hot air outlet 7a.

[0041] As described above, the hot air processing apparatus and the hot air processing apparatus supply unit of the present invention make it possible to prevent spillage of materials to be processed, such as tea leaves, and to suppress the need to enlarge the screw.

[0042] The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims. For example, although the extraction mechanism 8 in the embodiments described above is equipped with a rotary valve 82 and an exhaust fan 83 and is capable of substantially sealing the inside of the processing cylinder 3, the extraction mechanism 8 is not particularly limited, and a chute in which the tea leaves fall downward and the exhaust is released upward may be used.

[0043] The following notes concern related technical concepts that are not included in the concept of the present invention. The aforementioned supply unit 5, in that the hot air outlet 7a for blowing hot air into the processing cylinder 3 is provided on the outer circumference of the screw feeder 62, is not limited to use with a rotating processing cylinder 3, nor is it limited to the shape of the processing cylinder; it can be considered a technical concept applicable to any processing cylinder that performs hot air processing.

[0044] for example, A supply unit that supplies a workpiece and hot air to a processing cylinder that performs hot air processing, A material supply mechanism that supplies the material to be processed into the processing cylinder from one end using a screw feeder having a screw, The system includes a means for generating hot air, and a hot air supply mechanism that supplies hot air sent from the heat generator into the processing chamber from one end, The hot air supply mechanism may be a supply unit characterized in that a hot air outlet for blowing hot air into the processing cylinder is provided on the outer circumference of the tip of the screw feeder. [Explanation of symbols]

[0045] 10. Hot air treatment device 2 frames 3 Processing cylinder 31 Main unit 32 End plates 5 Supply Units 6. Screw hopper (material supply mechanism) 6a Tea leaf supply port (processed material supply port) 62 Screw Feeder 621 Tea leaf supply pipe 622 Screw 7 Hot air supply mechanism 7a Hot air outlet 71 Hot air generating means 73 Hot air outlet pipe 74 Closure member 8 Removal mechanism

Claims

1. A processing cylinder having a cylindrical body and a head plate fixed without gap to one end of the body, and rotating around the center of the body as an axis, A material supply mechanism that supplies the material to be processed into the processing cylinder from one end using a screw feeder having a screw, A hot air supply mechanism having a hot air generating means, which supplies the hot air sent from the hot air generating means into the processing cylinder from one end, The device includes a removal mechanism for removing the object to be processed by the hot air inside the processing cylinder from the other end of the processing cylinder, The material supply mechanism is such that the screw rotates coaxially with the processing cylinder, and the screw feeder penetrates the end plate, with a material supply port formed at its tip located inside the processing cylinder. The hot air supply mechanism is characterized in that a hot air outlet for blowing hot air into the processing cylinder is opened on the outer circumference of the screw feeder.

2. The hot air supply mechanism has a hot air outlet cylinder that penetrates the end plate and whose tip, where the hot air outlet is formed, is located inside the processing cylinder. The hot air processing apparatus according to claim 1, characterized in that the hot air blowing cylinder is slidably connected to the end plate via a sealing material.

3. The hot air processing apparatus according to claim 1 or 2, characterized in that the material to be processed supply port is located on the other end side of the processing cylinder, relative to the hot air outlet.

4. The hot air supply mechanism is characterized in that it has a blocking member that partially closes the hot air outlet, as described in claim 1 or 2.

5. A supply unit for a hot air processing device, which has a cylindrical body and an end plate fixed without gap to one end of the body, and supplies a workpiece and hot air to a processing cylinder that rotates around the center of the body, A material supply mechanism that supplies the material to be processed into the processing cylinder from one end using a screw feeder having a screw, The system includes a hot air generating means and a hot air supply mechanism that supplies the hot air sent from the hot air generating means into the processing cylinder from one end, The material supply mechanism described above has a screw that rotates coaxially with the processing cylinder, and the screw feeder penetrates the end plate and its tip is located inside the processing cylinder. The hot air supply mechanism is a supply unit for a hot air processing device, characterized in that a hot air outlet for blowing hot air into the processing cylinder is provided on the outer circumference of the screw feeder.

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