JP2002318072A - Continuous type powder and grain drying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous type powder and grain drying device to realize reduction of an equipment cost and reduction of the size of equipment and to be high in processing efficiency, since, in a conventional batch type drying device, processing efficiency is worse and an equipment cost is increased and the size of equipment is increased. SOLUTION: The powder and grain drying device 1 comprises a housing 2 in a horizontally long cylindrical shape; a powder and grain drying chamber 3 in a horizontally long cylindrical shape formed in the housing 2; a powder and grain feed part 4 situated in a state to communicate with the upper part or the side of the housing 2 and feeding a raw material, charged from an external part, to the powder and grain drying chamber 3, a powder and grain charge opening 5 situated at the powder and grain feed part 4; a powder and grain discharge opening 7 situated in a region on the downstream side of the powder and grain drying chamber 3, for example, the upper or the side (herein the upper part of a partition wall 6) of the housing 2; a powder and grain upper part discharge gate valve 8 situated at the powder and grain discharge opening 7; a powder and grain discharge opening 9 situated at the lower bottom part of the powder and grain drying chamber 3; and a powder and grain lower discharge gate 10 situated at the powder and grain discharge opening 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for drying a granular material, and more particularly, to a continuous type granular material drying apparatus capable of continuously performing a drying process.

[0002]

2. Description of the Related Art Among conventional drying apparatuses, there are those which employ a batch type which repeatedly performs operations of storing, drying, and falling, which involve a mixing operation. In the drying treatment performed by the batch method, it is necessary to separately provide a powder supply time and a powder discharge time before and after the drying time. For example, when it is desired to process 3 tons per hour, and when the capacity of the drying device is 1 ton per batch, the processing time is 20 minutes per batch. When considering the time distribution of each treatment, since the granules during drying need to stay to some extent, the drying time needs to be relatively long, and if the drying time is 10 minutes, it takes 20 minutes. Since it is necessary to perform one batch process, it is necessary to execute the supply time in 5 minutes and the discharge time in 5 minutes. Executing the supply in 5 minutes means that 1 ton needs to be supplied in 5 minutes, and if converted into hourly units, 12 tons (12 t
/ H) ability is required. Similarly, in the case of discharge, 1
If we do not discharge at a pace of 12 tons per hour,
Drying 3 tons per hour, supply and discharge each 1
A capacity of 2 t / h is required. This is a drawback of the batch type, and although the drying capacity is 3 t / h, it cannot be made until the supply capacity and the discharge capacity are improved because of the batch type. In short, it is sufficient to supply and discharge at 3 t / h in the case of the continuous type, but in the case of the batch type, the total capacity of 3 t / h is required unless the supply capacity and the discharge capacity are 12 tons / h. And the processing efficiency is very poor. As for the discharge, for example, a method in which the lower side of the drying device is fully opened and one ton is dropped instantaneously and discharged is conceivable. 1 in 15 minutes
Need to be discharged. In addition, in this case, an additional 1 ton tank is required below the drying device, and the equipment becomes large.

[0003]

As described above, in the conventional batch type drying apparatus, the processing efficiency is poor, and the equipment cost is increased and the equipment is enlarged. Therefore, the present invention has been made in view of the above-mentioned various problems of the conventional technology, and has as its object to realize high processing efficiency, reduction of equipment cost and downsizing of equipment. To provide a continuous powder drying apparatus.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, a continuous-type granule drying apparatus according to a first aspect of the present invention provides a horizontally-long cylindrical granule having a granule input port and a granule discharge port. A housing provided with a body drying chamber, a rotating blade member having a rotating shaft disposed below the granular material discharge port in a horizontal direction at the center of the housing, and the granular material discharge port. A discharge hopper integrally formed with the housing, for receiving the powdery and granular materials, and a heated gas supply device for supplying a heated gas to the powdery material drying chamber; The granular material continuously supplied from the above is horizontally transferred to the granular material discharge port while being stirred and fluidized by the rotating blade member, and the granular material is continuously overflowed from the granular material discharge port. It is a continuous powder drying apparatus characterized by flowing. As described above, by continuously performing the drying process of the granular material, the processing efficiency of the drying process is improved, the equipment cost is reduced, the size of the drying device is reduced, and the size of peripheral devices related to pneumatic transportation is reduced. Is possible. Here, the heating gas supply device is
For example, it means a general device for supplying a heated gas necessary for a drying process, such as a hot air blowing unit, a hot air supply duct, a heater and an air supply fan.

According to a second aspect of the present invention, there is provided a continuous-type granule drying apparatus.
2. The rotating blade member according to claim 1, wherein a plurality of stirring paddles each including a paddle arm and a stirring blade are provided on a rotating shaft in the powder and granule drying chamber. 3.
4. A continuous-type granule drying apparatus according to item 1. As described above, by providing a plurality of rotating stirring paddles inside the granule drying chamber and mechanically fluidizing the granules, it is possible to uniformly dry the powder and the powder, and the drying process efficiency is improved. improves. In addition, it becomes possible to use an energy-saving type peripheral device in which the supply capacity related to the pneumatic transportation on the upstream side is kept low.

[0006] The continuous powder and granular material drying apparatus according to claim 3 is characterized in that:
It is characterized in that the rotation direction of the stirring paddle rotating in the powder and granule drying chamber can be sequentially changed clockwise or counterclockwise. As described above, by sequentially changing the rotation direction of the stirring paddle rotating inside the granule drying chamber in a clockwise or counterclockwise direction, the residence time of the granules being dried inside the granule drying chamber is determined. Can be adjusted, and the end-volume processing at the end of the drying processing becomes easy.

[0007] The continuous powder and granular material drying apparatus according to claim 4 is characterized in that:
The stirring blade is inclined in a direction intersecting each other between adjacent stirring paddles. In this way, by inclining the stirring blades of the adjacent stirring paddles in the direction intersecting with each other, the powder particles vigorously flow inside the powder particle drying chamber to perform the drying process promptly and effectively. It becomes possible.

[0008] According to a fifth aspect of the present invention, there is provided a continuous powder drying apparatus.
A plurality of granule discharge ports are provided in the granule drying chamber, and a granule top discharge gate using a slide type gate valve is adopted on one of the granule discharge ports, and the granule top discharge gate is The apparatus is characterized in that a means for adjusting the amount of the granular material discharged from the inside of the granular material drying chamber to the granular material discharge port is provided.
As described above, by adopting the upper discharge gate of the granular material using the slide type gate valve at the granular material discharge port of the granular material drying chamber, the discharge amount of the granular material during the drying process can be freely adjusted. it can. Further, by providing a means for simultaneously adjusting the amount of the granular material supplied to the granular material drying chamber, it is possible to adjust the residence time of the granular material that is being dried inside the granular material drying chamber, It is possible to dry the powder at a low temperature, and it is possible to dry the powder while maintaining the quality of the raw material of the powder such as grains sensitive to high temperature at high quality.

[0009] The continuous powder drying apparatus according to claim 6 is
A plurality of powder outlets are provided in the powder drying chamber, and one of the powder outlets is provided with a lower discharge gate using a sliding gate valve. in this way,
By providing a lower discharge gate at the bottom of the granule drying chamber at the bottom of the granule drying chamber, it is possible to easily remove the granules remaining inside the separation sheave of the granule drying chamber. Becomes possible. Means for controlling the amount of the granular material discharged from the inside of the granular material drying chamber to the granular material discharge port, and the granular material supplied to the granular material drying chamber from the granular material input port May be provided.

[0010] The continuous powder drying apparatus according to claim 7 is
A mesh-shaped separation sieve is provided inside the powder and granule drying chamber. In this manner, fine powder can be removed from product components of the granular material by the sieving effect of the separation sieve provided inside the granular material drying chamber.

[0011] The continuous powder and granular material drying apparatus according to claim 8 is characterized in that:
It is characterized in that a fine powder removal filter unit is integrally built in the housing. As described above, since the dust removal filter unit is integrally incorporated in the housing, the dust component can be easily collected from the product components of the powder without providing a dust collector separately in the air transport line. It becomes possible. .

[0012] According to a ninth aspect of the present invention, there is provided a continuous type granular material drying apparatus,
It is characterized in that a quantitative screw feeder or rotary valve is connected to the discharge hopper. In this way, by installing a discharge device having a quantitative property, even when the powder is discharged from the granule drying device in a state without the quantitative property, the quantitative property is determined by a screw feeder or a rotary valve. Can be maintained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a granular material drying apparatus 1 according to the present invention will be described.
The embodiment will be described with reference to FIGS. As shown in the figure, a granular material drying apparatus 1 according to an embodiment includes a horizontally long cylindrical housing 2, a horizontally long cylindrical granular material drying chamber 3 formed inside the housing 2, and an upper portion or a side of the housing 2. And a granule supply unit for supplying a raw material supplied from outside to the granule drying chamber 3, and a granule provided in the granule supply unit 4. The inlet 5, a region downstream of the granular material drying chamber 3, for example, a granular material outlet 7 provided in an upper portion or a side portion (here, an upper portion of the partition 6) of the housing 2 and a granular material outlet 7. A powder / particle upper discharge gate valve 8 provided; a powder / particle discharge port 9 provided at a lower bottom of the powder / particle drying chamber 3; and a powder / particle lower part provided at the powder / particle discharge port 9. And a discharge gate 10. Depending on the internal pressure of the drying chamber 3, if necessary,
A rotary valve (not shown) having an air lock function can be provided in the powder supply unit 4 to prevent the discharge of the powder.

The above-described powder / particle upper discharge gate valve 8 is attached to the powder / particle discharge port 7 on the outlet side of the powder / particle drying chamber 3. This is a kind of valve device that performs an opening and closing operation when discharging the granular material to the downstream side. The slide gate valve for powder is not shown in detail, but has a substantially square shape in plan view, a rectangular shape in front view, a ring-shaped oblong flat oblong seal member in side view, and a seal member vertically. It comprises a sliding gate plate, a casing having an opening in which the gate plate is movably incorporated, and a pair of air cylinders which are fluid pressure actuators for opening and closing the gate plate. The details are omitted. In the present embodiment, the opening of the casing of the sliding gate valve for the granular material is attached to the granular material discharge port 7 of the granular material drying chamber 3 so as to match.

Further, the granular material drying apparatus 1 rotatably supports the rotating shaft 11 (here, a uniaxial structure) rotatably mounted horizontally inside the granular material drying chamber 3. , A driving-side bearing unit 12 and a driven-side bearing unit 13 attached to the side wall 2a and the partition wall 6, respectively, and a plurality of paddles 15 attached to the outer diameter surface of the rotating shaft 11 at predetermined intervals or at appropriate intervals. .

As shown in FIG. 2, the inside of the powder and particle drying chamber 3 has a hollow cylindrical shape.
Is formed so as to be in communication with the powder supply unit 4. As a result, the granules dropped into the granule inlet 5 of the granule supply unit 4 pass through the granule supply unit 4 and pass through the granule drying chamber 3.
It is supplied inside. Powder drying room 3
A rotary shaft 11 penetrates the center of the rotary shaft 11, and a paddle 15 is attached to an outer diameter surface of the rotary shaft 11. As shown in FIG. 1, a plurality of paddles 15 are attached at equal intervals to the axis of the rotating shaft 11. The paddle 15 includes a paddle arm 16 protruding from the rotation shaft 11 in the outer peripheral direction, and a stirring blade 17 attached to a tip of the paddle arm 16. The stirring blade 17 is attached so that the plate surface is appropriately inclined with respect to the rotation shaft 11, and the powder supplied to the inside of the powder drying chamber 3 is mixed with the stirring blade 17 attached diagonally. To dry the granules.
In addition, if the same effect can be expected for the stirring blade 17,
Other shapes and arrangements are acceptable. It is preferable that the paddle 15 is fixed such that the direction of inclination of the plate surface of the stirring blade 17 fixed to the paddle arm 16 is in a direction in which the adjacent paddles 15 alternately intersect.

That is, the paddle 15 is at a predetermined angle with respect to the rotating shaft 11 (here, generally in the range of 10 to 180 degrees),
Further, a plurality (here, 11) protruding from the left end to the right end in the axial direction at predetermined intervals or at appropriate intervals in the radial direction.
The paddle arm 16 is provided with a stirrer blade 17 of various shapes such as a T-shape at an appropriate angle with respect to the radial axis at the tip of the paddle arm 16 so as to scoop up the powder and granules. ing. The direction of the stirring blade 17 may be the same direction, or the direction of the stirring blade 17 may be set to the direction in which adjacent blades intersect. If the direction of the scraping force intersects, the stirring is more effectively performed. May be For example, the directions may be alternately alternated one by one (for example, alternately between two and one). The agitating blade 17 has a front edge formed as a gentle arc-shaped surface serving as a front end portion, and keeps a constant gap between the inner cylindrical surface and the front edge when rotating inside the granular material drying chamber 3. It has become. The plurality of paddles 15 can uniformly dry the powder. Even if the number of paddles 15 is relatively reduced, an effective drying effect can be obtained. Fewer blades can reduce hygiene concerns. In the case of food-related powders and granules, there has been a great deal of interest in contamination recently, and a small number of blades has the effect of reducing the risk of contamination. The stirring blades 17, 17 ', 17 "
Can take various forms as shown in FIGS. 3 (a) to 3 (c).

Further, the granular material drying apparatus 1 is mounted on the outside of the driving side bearing unit 12 and drives the rotary shaft 11 to be driven by a geared motor 18 (which may be provided with a driving force transmission mechanism and driven indirectly). A powder / particle discharge hopper 20 attached so as to cover the outlet side region of the housing 2 and discharging the powder / particles overflowing from the powder / particle discharge port 7 of the powder / particle drying chamber 3 downward; A rotary valve 22 connected to a discharge port 21 below the body discharge hopper 20. The rotary valve 22 (which may be provided with an air lock function here) transfers the powder to the downstream side by using the rotational force of the rotor and transports the powder to the downstream side. The rotor is provided outside the casing. It is driven to rotate by a geared motor (not shown).

The powder / particle lower discharge gate 10 attached to the powder / particle discharge port 9 at the lower bottom of the powder / particle drying chamber 3 includes:
The same thing as the slide gate valve 8 for powder described above is employed. For this reason, the structure of the powder / granule lower discharge gate 10 and the method of attaching it to the powder / granule discharge port 9 of the powder / granule drying chamber 3 are based on the above-mentioned powder / granule upper discharge gate valve 8.
The same as above, but the direction of movement of the gate plate is horizontal and orthogonal to the gate plate of the gate valve 8.

The discharge port 21 at the bottom of the powder discharge hopper 20
May be replaced with a screw feeder 25 instead of the rotary valve 22. As shown in FIG. 4, a screw shaft 27 that conveys the granular material is penetrated inside the horizontally long casing 26, and the screw shaft 27 that conveys the granular material from the discharge port 21 of the granular material discharge hopper 20 into the casing 26 of the screw feeder 25. The supplied granular material is transported by the fins 28 of the screw shaft 27 and discharged to the lower part. The screw shaft 27 is connected to the casing 26
Is driven by a geared motor 29 provided outside one end of the motor.

Although not shown, a powder level meter or a flow meter or the like is provided in the powder / particle drying chamber 3 or a powder / particle level meter or the like in the powder / particle discharge hopper 20, and their signals are transmitted. By detecting, the overflow amount is calculated, and the control device 30 automatically adjusts the position of the gate plate of the upper discharge gate valve 8 and / or the lower discharge gate 10 of the granular material.

As shown in FIGS. 1 and 2, the granule drying apparatus 1 has a horizontally long hot air blowing unit 31 attached to the upper part of a double-structured powder drying chamber 3, and a hot air blowing unit. Hot air supply duct 3 for supplying hot air to unit 31
2. A heater 33 provided inside the hot air supply duct 32, an air supply fan 34 mounted on the upstream side of the hot air supply duct 32, and a granular material which is configured to be surrounded by an outer plate and an inner plate. Duct 35 installed to surround drying chamber 3
(Partitioned by a partition 35a), a hot air inlet 36 penetrating through the inner wall of the duct 35, and a fine powder removal filter provided at the lower portion of the granular material drying chamber 3 through a communication opening 37 at the lower portion thereof. Unit 38, fine powder removal filter unit 38
And a dust box 40 for collecting the fine powder dropped on the lower surface of the fine powder removing filter unit 38.

As shown in FIG. 2, the inside of the powder and particle drying chamber 3 has a hollow cylindrical structure having a double structure. And a fine-powder removing filter unit 38 communicates with the lower part of the granular material drying chamber 3. A separation sheave 41 is provided on the inner plate of the powder drying chamber 3. As a result, the granules dropped into the granule inlet 5 of the granule supply unit 4 pass through the granule supply unit 4 and are supplied to the inside of the granule drying chamber 3, and at the same time, The wind is supplied to the granular material drying chamber 3 via the warm air inlet 36.

The fine-powder removing filter unit 38 is a filter unit for suctioning and removing fine powder components that have fallen through the mesh of the separation sheave 41. The internal space of the housing is divided into a clean air side space and a dust-containing air side space by a cell plate. An oval retainer with an envelope-shaped filter cloth is inserted into a plurality of through-holes provided in the cell plate, each of which has a partitioned box shape, and is fixed by a fixture. The fine-powder removing filter unit 38 is provided with a diaphragm valve with an electromagnetic valve and a sequence controller for generating backwash air for blowing fine powder attached to the filter cloth with high-pressure air.

Next, the operation of the granule drying apparatus 1 of the present embodiment will be described. In the present embodiment, unlike the conventional batch type drying apparatus, the drying process of the granular material is continuously performed, and the continuous granular material drying process will be described below. First, a raw material supply line such as a flour mill is connected to the granular material supply port 5 of the granular material supply unit 4, and a plurality of types of different granular materials to be dried are supplied to the granular material drying chamber 3. I do. In the step of charging the powder and granules, an amount of the powder and the powder which is substantially filled is determined by the capacity of the powder and particle drying chamber 3. It is supplied to the inside of the granule drying chamber 3. Control device 3
0, the start button is turned on, and the upper discharge gate valve 8 is opened. The controller 30 reads a gate open signal from a sensor provided in the upper discharge gate valve 8 and reads the gate opening signal. The pneumatic conveying device for the granular material connected to the upstream side of the supply unit 4 is started. This allows
The granules to be dried are continuously supplied into the granule drying chamber 3. That is, during operation, the upper discharge gate valve 8 is in the open state, but the lower discharge gate 10 is in the closed state. When a predetermined amount of the granular material is dropped into the granular material drying chamber 3 and becomes substantially full, the control device 30 outputs an operation signal to the geared motor 18 to start the drying process.

When the geared motor 18 is started, the driving force of the geared motor 18 is applied to the driving side bearing unit 1.
2 and the rotating shaft 11 via the driven side bearing unit 13
Is transmitted to When the rotation shaft 11 starts rotating, the plurality of paddles 15 start rotating as indicated by arrows in the figure. When the plurality of paddles 15 start rotating inside the powder and particle drying chamber 3, the stirring blade 17 fixed to the paddle arm 16
It rotates while scraping up the granular material filled inside the granular material drying chamber 3. At this time, since the adjacent paddles 15 rotate in directions in which the plate surfaces cross each other, this paddle 1
By the angle of 5, the granules subjected to the drying process are:
The rotating shaft 11 is extruded toward the outer periphery of the rotating shaft 11 so as to be sandwiched between two adjacent stirring blades 17. As described above, when the drying process is performed by the paddle 15, the granules are fluidized violently inside the granule drying chamber 3, and the drying process is promoted. In addition to the paddle 15, a means of providing a screw model or a gate as a discharge port at the center and performing a drying process with a ribbon mixer is also conceivable, but in this case, there is a problem that overflow hardly occurs.

Here, the filling state of about half of the capacity of the granule drying chamber 3 is almost 100%, and the maximum value and the minimum value are from ± 20% to 4%.
Up to about 0% is a suitable filling rate at which the powder is dried,
If it is more than this, overroll occurs, and if it is too small, it cannot be scraped well. In order to increase the filling rate, the conventional drying apparatus employs a batch type in which the operation of storing, drying, and dropping is repeatedly performed. It becomes possible to have a structure for discharging while drying.

The stirring time in the drying step continuously performed inside the granular material drying chamber 3 is arbitrarily determined according to the capacity of the granular material drying chamber 3 and the type of the granular material to be dried.
In addition, the control device 30 controls the powder / particle upper discharge gate valve 8.
A gate adjustment signal is output to the gate of the powder / granular material discharge gate valve 8 so that the air cylinder operates to adjust the gate plate. Can be controlled. The sliding amount of the gate of the particulate upper discharge gate valve 8 can be changed by changing the opening degree so that the amount of the particulate discharged from the interior of the particulate drying chamber 3 to the particulate outlet 7 is changed. Can be adjusted, and a means for adjusting the amount of the granules to be supplied from the granule inlet 5 to the granule drying chamber 3 together with the granules may be provided.

When the granules are continuously fed into the granule drying chamber 3 from the granule input port 5, the powder which is being dried by the paddle 15 in the granule drying chamber 3 is continued. Since the granules are fluidized and filled with air, the paddles inside the granule drying chamber 3 are generated by the pressure of the new granules pushed into the inside of the granule drying chamber 3 from the granule input port 5. Fifteen
The granules that have been agitated and in the overflow state continuously overflow from the granule discharge port 7. Although the overflow amount can be adjusted to some extent by opening and closing the gate, even if the discharge is performed in a non-quantitative state, a screw feeder 25 or a rotary valve
Numeral 2 is a discharge device having a quantitative property, and there is no particular problem since it can maintain the quantitative property.

Then, the granular material discharge port 7 of the granular material drying chamber 3
Are discharged into the inside of the powder discharge hopper 20. The powder dropped into the powder discharge hopper 20 falls naturally and is supplied from the discharge port 21 of the powder discharge hopper 20 into the rotary valve 22. The granular material supplied to the rotary valve 22 is supplied to the inside of a rotor provided inside the casing. Since the rotor is rotated by a geared motor (not shown), the powder is sequentially sent from the upstream side to the downstream side of the rotary valve 22.

In the case of the screw feeder 25,
The supplied granular material is mounted on fins 28 of a screw shaft 27 that is penetrated inside a casing 26. Since the screw shaft 27 is driven by the geared motor 29, the screw shaft 27 is conveyed by the fins 28 of the rotating screw shaft 27 and sent out to the powder-particle conveying pipe 14 attached on the downstream side.

When the last drying step is completed, the powder remaining in the powder drying chamber 3 is removed, or when the temporarily filled powder is discharged, the powder is not used. The granule lower discharge gate 10 is opened and discharged from the granule discharge port 9.

Further, if necessary, if the rotation of the paddle 15 is rotated in the normal or reverse direction, the powder or granules can be sent out if the rotation is made normal. If the rotation is reversed, a force acts so as not to send out the powder or granules. Thereby, the residence time of the granular material in the granular material drying chamber 3 can be adjusted, and the end amount processing is also simple. This will be described in detail below. Since the drying flow is set in advance, if a long drying time is required, the stirring blade 17 must be set at an angle such that the granular material is returned. Conversely, when it is not necessary to lengthen the drying time so much, the stirring blade 17 is set at an angle such that the powdery material is sent out. However, even if it is set in the direction in which the powder is returned, the raw material is always sent, and when it is returned, it overflows and repeats, and the powder gradually moves toward the discharge. The point is that they are used properly depending on the necessity of the drying time. Speaking of the relationship with the temperature of the hot air, in the case of foods and the like, it is necessary to prevent deterioration, but it is necessary to set a longer residence time of the granular material in the drying chamber 3, not only for foods. Even in this case, it is possible to improve the product quality of the granular material. In such a case, it is preferable to set the angle of the stirring blade 17 so that the normal rotation of the rotating shaft 11 is not on the side of discharging the granules but on the side of returning the granules. That is, the angle of the stirring blade 17 is set to either the return side or the feed side, and the geared motor 18 is controlled so as to rotate forward and reverse. This is because the rotation direction of the paddle 15 can be changed by switching the geared motor 18 between normal rotation and reverse rotation, but the flow of air cannot be easily changed. Therefore, depending on the conditions of the drying, the main rotation forward or
It is necessary to change the stirring blade 17 at the time of designing whether the main rotation is the reverse rotation. In addition, the residence time of the granules in the drying chamber 3 may be adjusted by the rotation speed of the rotating shaft 11. When ending the production in one day, the rotary shaft 11 may be fed in a reverse direction. That is the last rounding process. Adjustment of the residence time of the granular material is performed by the control device 3.
This is performed by a command from 0.

On the other hand, when the stirring and drying operation is started in the powder and particle drying chamber 3, the heater 33 starts heating, and the air supply fan 34 and the exhaust fan 39 start operating. The warm air blown from the warm air supply duct 32 is supplied from the warm air blow-out unit 31 to the granular material drying chamber 3 through the warm air inlet 36 (see the arrow in FIG. 1). At this time, since the powder is vigorously fluidized by the rotation of the plurality of stirring paddles 15 inside the powder drying chamber 3, the warm air blown into the separation sheave 41 is subjected to a stirring process. The powder in the process is effectively dried, and only the fine powder passes through the separation sheave 41 and is sucked into the fine powder removing filter unit 38.

In the powder and particle drying chamber 3, only the raw material components having a larger particle diameter than the mesh of the separation sheave 41 are separated from the powder of the powder and granules which have been stirred and dried by the warm air and the stirring paddle 15. The mesh remains without falling, and is discharged from the granular material discharge port 7. On the other hand, the fine powder component that has dropped after passing through the mesh of the separation sheave 41 in the granular material drying chamber 3 is collected and removed by the fine powder removal filter unit 38. By the backwashing operation, the fine powder component adsorbed on the fine powder removal filter unit 38 further falls and accumulates inside the dust box 40. The dust box 40 is opened and closed to collect the remaining fine powder component.

As described above, according to the apparatus for drying a granular material 1 of the present embodiment, the following effects are obtained. (1) Since the drying process of the granular material can be performed continuously, the processing efficiency of the drying process can be effectively performed in a short time. (2) Since the drying process of the granular material can be performed continuously, it is possible to reduce the size of the apparatus main body and the size of peripheral devices related to pneumatic transportation. (3) An energy-saving type in which a plurality of rotating stirring paddles 15 are provided inside the granular material drying chamber 3 to mechanically fluidize the granular material so as to reduce the supply capacity related to the pneumatic transport on the upstream side. Peripheral devices can be used. (4) A plurality of rotating stirring paddles 15 are provided inside the granular material drying chamber 3, and the stirring blades 17 of the adjacent stirring paddles 15 are inclined in directions intersecting with each other. It is possible to rapidly and effectively carry out the drying treatment by vigorously flowing the granules agitated in the inside. (5) The stirring paddle 15 that rotates inside the powder drying chamber 3
By sequentially changing the rotation direction of the particles clockwise or counterclockwise, it is possible to adjust the residence time of the granular material that is being dried inside the granular material drying chamber 3, and it is possible to adjust the last end amount of the drying process. Processing becomes easy. (6) By making it possible to adjust the residence time of the granules being dried inside the granule drying chamber 3, the granules can be dried at a low temperature, and the grains are sensitive to high temperatures. It is possible to perform a drying treatment while keeping the raw material of the granular material, such as a kind, high quality. (7) By adopting an upper discharge gate valve 8 using a slide type gate valve at the outlet 7 of the powder drying chamber 3, the discharge amount of the powder during the drying process can be reduced. It can be adjusted freely. (8) Separation sheave 4 provided inside powder and granule drying chamber 3
By the sieving effect of 1, fine powder can be removed from the product component of the granular material. (9) By integrating the fine-powder removing filter unit 38 inside the housing 2, the fine-powder component can be easily collected from the product component of the granular material without separately providing a dust collector in the pneumatic transportation line. Becomes possible. (10) Since the entire apparatus has a compact and simple shape and structure, the apparatus itself can be maintained in a clean state and the work environment can be made clean. In addition, there is little adhesion or remaining of powder particles on the exterior panel surface or inside of the housing 2 of the apparatus, and cleaning of the apparatus becomes extremely easy. (11) By making the entire apparatus compact, the installation area in a factory or the like may be 20 times smaller than that of a conventional apparatus.
Percentage can be reduced to less than one percent, and it can be installed and installed in small-scale flour mills, which can significantly reduce costs in all aspects.

The present invention is not limited to the above-described embodiment, but can be modified without departing from the technical idea of the present invention. Equivalents and the like are also included in the technical scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a continuous powder drying apparatus.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIGS. 3A to 3C are front views showing various shapes of a stirring blade.

FIG. 4 is a front sectional view of the screw feeder.

[Explanation of symbols]

1 ... drying device, 2 ... housing,
3 ... granule drying room, 4 ... granule supply section, 5
... Granule input port, 7 ... Granule discharge port, 8 ...
Granular material upper discharge gate, 9 ... Granular material discharge port, 10
... powder and lower discharge gate, 11 ... rotating shaft, 15
... stirring paddle, 16 ... paddle arm, 17 ... stirring blade, 18 ... geared motor, 20 ... powder discharge hopper, 22 ... rotary valve, 25 ... screw feeder, 30 ... control device, 31 ... hot air blowing unit, 32 ... Hot air supply duct, 33 ... Heating heater, 34 ... Air supply fan, 35 ... Duct, 3
6 ... warm air inlet, 38 ... fine powder removal filter unit,
39: exhaust fan, 40: dust box, 4
1. Separation sheave

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F26B 3/06 F26B 3/06 21/00 21/00 L 25/00 25/00 J 25/04 25 / 04 F-term (reference) 3L113 AA06 AA07 AB03 AC08 AC40 AC45 AC46 AC48 AC49 AC52 AC53 AC58 AC63 AC67 AC83 BA02 CA05 CA06 CB05 CB22 CB24 CB29 CB34 CB39 DA06 DA10 DA14 DA24 4G037 AA12 AA18 CA01 DA21 EA03 4G01A DBA

Claims (9)

[Claims] 1. A housing having a horizontally long cylindrical powder drying chamber having a powder inlet and a powder outlet, and the powder outlet horizontally in the center of the housing. A rotating blade member provided with a rotating shaft disposed below, a discharge hopper integrally formed with the housing, for receiving the granular material from the granular material discharge port, and the granular material drying chamber A heating gas supply device for supplying a heated gas to the powder particles, the powder particles being continuously supplied from the powder particle inlet through the rotary blade member while being stirred and fluidized. A continuous powder and granular material drying apparatus characterized in that the powder is transferred laterally to a body discharge port, and the powder and granules are continuously overflowed from the powder and particle discharge port. 2. The rotary blade member according to claim 1, wherein a plurality of stirring paddles each including a paddle arm and a stirring blade are installed on a rotating shaft in the powder and granular material drying chamber. The continuous powder drying apparatus according to the above. 3. The continuous granular material according to claim 1, wherein the rotating direction of the stirring paddle rotating in the granular material drying chamber can be sequentially changed clockwise or counterclockwise. Drying equipment. 4. The continuous powder drying apparatus according to claim 1, wherein the stirring blade is inclined in a direction intersecting the adjacent stirring paddles. 5. The powder and granule drying chamber is provided with a plurality of the powder and granule discharge ports, and one of the powder and granule discharge ports is provided with a powder and granule upper discharge gate using a slide type gate valve. 5. The granular material upper discharge gate further comprises means for adjusting the amount of the granular material discharged from the inside of the granular material drying chamber to the granular material discharge port. 4. The continuous-type granule drying apparatus according to item 1. 6. A powder and granule discharge port is provided in the powder and granule drying chamber, and a powder and granule lower discharge gate using a slide type gate valve is adopted in one of the powder and granule discharge ports. The continuous powder and granular material drying apparatus according to claim 1. 7. The continuous granular material drying apparatus according to claim 1, further comprising a mesh-shaped separation sheave inside the granular material drying chamber. 8. The continuous powder and granular material drying apparatus according to claim 1, wherein a filter unit for removing fine particles is integrally incorporated in the housing. 9. The continuous granular material drying apparatus according to claim 1, wherein a quantitative screw feeder or a rotary valve is connected to the discharge hopper.