JP7141045B2 - Powder drying equipment - Google Patents

Description

The present invention relates to a powder drying apparatus. However, the "powder" as an object to be dried (object to be dried) includes those in a wet state containing a small amount of liquid and those in a mixed state with liquid (for example, slurry).

Various powders are used as industrial raw materials in various industrial fields. Examples of the powder include color powder (for example, oxide pigment), ceramic powder, soil powder, and metal powder. Various devices and methods for drying such powder have also been proposed. For example, there is a container that employs a sealed container as a container for drying powder (see Patent Documents 1, 2 and 3). In addition, as a heat source or heating method for drying powder, a method in which hot air (dry, high-temperature air) is sent into a drum-shaped sealed container, a method in which a heating wire is arranged around the sealed container, and the like are known. there is

On the other hand, the demand for powdered raw materials is also trending from the use of a single type in large quantities to a variety of types in small lots, and there is a need for a powder drying apparatus that can flexibly respond to the demand for a large variety of types in small lots.

Japanese Patent No. 3455848 Japanese Patent Application Laid-Open No. 2007-93178 JP 2009-28707 A

The object of the present invention is to be able to switch the operation mode according to the amount of powder to be dried, to easily change the type of material to be processed, and to flexibly respond to the demand for a wide variety of products and small lots. To provide a drying apparatus for fine powder. Another object of the present invention is to provide a powder drying method using such a drying apparatus.

The present invention is an apparatus for drying powder, comprising:
a support frame installed on the installation surface;
a swing frame that is tiltably supported by the support frame via a horizontal support shaft;
an inner bucket holding container rotatably supported about the central axis with respect to the swing frame;
an inner bucket as an open container that is detachably housed and held inside the inner bucket holding container and that houses the powder as the material to be dried;
driving means for rotationally driving the inner bucket holding container together with the inner bucket housed therein ;
a rotary joint disposed below the inner bucket holding container ,
At least an outer peripheral portion of the inner bucket is provided with a flow passage for circulating the heated fluid ,
The powder drying apparatus is characterized in that the heating fluid flow path set at least in the outer peripheral portion of the inner bucket is connected to a heating fluid supply source via the rotary joint .

According to the drying apparatus of the present invention, the swing frame supported by the support frame tiltably supports the inner bucket holding container in which the inner bucket is housed and held. Therefore, when the swing frame supported by the support frame is maintained in an inclined posture with respect to a horizontal installation surface (or a vertical line in the direction of gravity), the inner bucket and the inner bucket holding container also swing. It is held in an inclined posture together with the frame. Then, the inclination angle of the inner bucket (and thus the inclination angle of the inner bucket holding container and the swing frame) at this time is set according to the amount of powder, which is the material to be dried, stored in the inner bucket. Specifically, when the amount of powder is large, the inclination of the inner bucket is brought closer to an upright state. To increase the contact area between the inner wall surface of an inner bucket and the powder as much as possible while preventing the powder from spilling out of the inner bucket even when the pressure changes. By rotating the inner bucket holding container together with the inner bucket by the driving means while maintaining such an inclined posture, the heating fluid is circulated in the circulation passage set in the outer peripheral portion of the inner bucket during the rotation. Thus, the powder stored in the inner bucket can be dried efficiently.
The drying apparatus of the present invention is provided with a rotary joint disposed below the inner bucket holding container, thereby maintaining a state in which the inner bucket and the inner bucket holding container are relatively rotatable with respect to the swing frame. Meanwhile, the heating fluid can be continuously/continuously supplied to the circulation passage of the rotating inner bucket from the heating fluid supply source installed outside the drying apparatus.

Preferably, in the powder drying apparatus of the present invention,
The drive means
a chain wound around the outer circumference of the inner bucket holding container;
an electric motor attached to the swing frame to drive the chain;
characterized by comprising

According to this configuration, a relatively narrow intermediate region between the inner bucket and the inner bucket holding container that accommodates and holds the inner bucket is used to synchronously rotate the inner bucket holding container and the inner bucket. The means can be constructed compactly.

Preferably, said heating fluid is steam or hot water, or oil.

When the heated fluid supplied to the flow passage on the outer periphery of the inner bucket is high-temperature steam (for example, 120 to 150 ° C.), almost the entire inner bucket (particularly, the inner wall surface in contact with the powder) is heated. It can be heated evenly and stably at a predetermined drying temperature. Moreover, when hot water (eg, 70 to 80° C.) is used as the heating fluid, the powder can be dried at a relatively low temperature. Oil can also be used as the heating fluid. By circulating water (cold water) through the circulation passage after circulating steam or hot water, the drying device can also function as a cooling device.

A second invention in the present application is a method for drying powder using a powder drying apparatus,
The powder drying device used in the method is
a support frame installed on the installation surface;
a swing frame that is tiltably supported by the support frame via a horizontal support shaft;
an inner bucket holding container rotatably supported about the central axis with respect to the swing frame;
an inner bucket as an open container that is detachably housed and held inside the inner bucket holding container and that houses the powder as the material to be dried;
driving means for rotationally driving the inner bucket holding container together with the inner bucket housed and held therein;
A powder drying apparatus, wherein a flow path for circulating a heated fluid is set at least on the outer periphery of the inner bucket,
The method is
While maintaining the inner bucket holding container and the inner bucket accommodated and held therein in an inclined posture, rotating the inner bucket holding container and the inner bucket in the inclined posture by the driving means, and The powder contained in the inner bucket is dried while a heated fluid is circulated in the flow passage on the outer periphery of the inner bucket .
A powder drying method characterized by:

According to this drying method, the powder in the inner bucket can be dried efficiently according to the amount of the powder to be dried.

According to the drying apparatus and drying method of the present invention, the operation mode can be switched according to the amount of powder to be dried, and the variety to be treated can be easily replaced, so that various types and small lots can be handled. We can respond flexibly to demand.

To enumerate the advantages of the present invention on a more specific level are as follows.
・By rotating the inner bucket and the inner bucket holding container while maintaining the inclination angle of the inner bucket and the inner bucket holding container at an appropriate inclination angle according to the amount of powder to be dried, the contact surface range can be changed. Since it can be made large, the powder can be dried efficiently.
・Since the inner bucket for storing the powder is configured as an open container, the dried powder can be easily taken out from the inner bucket simply by tilting the inner bucket together with the swing frame body after the drying operation is completed. can be done.
・The inner bucket is indirectly attached to the swing frame through the inner bucket holding container, and the inner bucket is detachable from the inner bucket holding container, so that only the inner bucket can be easily removed from the drying device. be able to. For this reason, work such as cleaning associated with product change can be completed using only the inner bucket. Also, if a plurality of inner buckets are prepared in advance, it is possible to minimize the loss of work time associated with the change of product type, and to speed up the work.

1 is an overall side view of a powder drying apparatus according to one embodiment of the present invention; FIG. The support frame of the drying apparatus of FIG. 1 is shown, (A) is a side view, (B) is a rear view. The tilting frame body of the drying apparatus of FIG. 1 is shown, (A) is a side view, (B) is a rear view. The inner bucket holding container of the drying apparatus of FIG. 1 is shown, (A) is a radial cross-sectional view, and (B) is a bottom view. The inner bucket of the drying apparatus of FIG. 1 is shown, (A) is a side view, (B) is a bottom view. 6 is a radial cross-sectional view of the inner bucket shown in FIG. 5; FIG. FIG. 4 is a schematic cross-sectional view showing a state in which an inner bucket is housed and held in an inner bucket holding container; FIG. 8 is an enlarged view of the vicinity of the bottom of FIG. 7 and is a cross-sectional view showing an outline of a heating fluid distribution/recovery mechanism; Explanatory drawing which shows a series of procedures of the drying work using a drying apparatus. Explanatory drawing which shows a series of procedures of the drying work using a drying apparatus. Explanatory drawing which shows a series of procedures of the drying work using a drying apparatus.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall side view of the drying apparatus of this embodiment in an assembled state. However, in FIG. 1, it should be noted that in order to alleviate the difficulty of viewing due to overlap of outlines and the like, some of the members are omitted or cut away to improve readability. 2 to 8 are diagrams showing the main components of the drying apparatus for each component.

As shown in FIG. 1, the powder drying apparatus includes a support frame 10 fixedly installed on an installation surface S (for example, the floor surface of a factory), a swing frame 20, and an inner bucket holding container 30 ( For convenience of explanation, it is also called an “outer bucket 30 ”) and an inner bucket 40 .

As shown in FIGS. 2A and 2B, the support frame 10 is constructed by assembling a plurality of frame members 11 extending vertically (perpendicularly), laterally (horizontally) or diagonally with respect to the installation surface S (see FIG. 1). It is a frame-like structure consisting of three parts, and forms the main skeleton of the drying apparatus main body. A pair of bearing portions 12 facing each other are provided on the upper portion of the support frame 10 . These pair of bearing portions 12 are portions that support horizontal support shafts 22 provided in a swing frame 20 to be described later. It is tiltably supported.

As shown in FIGS. 3A and 3B, the swing frame 20 is a substantially rectangular parallelepiped cage-like or dice-like frame formed by assembling a plurality of vertically or horizontally extending frame members 21 . Horizontal support shafts 22 are provided on both left and right sides of the swing frame 20 as viewed in FIG. 3(B). By attaching these horizontal support shafts 22 to the bearing portions 12 of the support frame, the swing frame 20 is supported to be tiltable with respect to the support frame 10 . A connector 23 is attached to one end of the lower surface of the swing frame 20 . The connector 23 is a part for connecting a wire or rope (not shown) to the swing frame 20 . By pulling the wire or rope tied to the connector 23 with a winch (hoisting machine) or the like, the attitude (that is, the angle of inclination) of the swing frame 20 with respect to the support frame 10 can be changed in various ways. The weight balance of the swing frame 20 is designed so that it maintains a substantially upright posture (see FIG. 1) with respect to the installation surface S in a natural state (unloaded state) in which it is not pulled by wires or ropes. ing. Note that the posture of the swing frame 20 may be changed (adjusted) by a mechanism using a hydraulic cylinder instead of the wire or rope.

A plurality of roller mechanisms (24, 25, 26) are provided. For example, as shown in FIGS. 3A and 3B, four horizontal roller mechanisms 24 are arranged at the four corners of the upper region of the swing frame 20, and the lower region of the swing frame 20 Four horizontal roller mechanisms 25 are provided at the four corners (the number of horizontal roller mechanisms 24, 25 is not limited to four.) These eight horizontal roller mechanisms (24, 25 ) contacts a part of the outer circumference of the outer bucket 30 arranged in the swing frame body, and positions the outer bucket 30 in the radial direction (horizontal direction) while allowing the outer bucket 30 to rotate. In addition, a total of four vertical roller mechanisms 26 are arranged at the central positions of the four sides of the lower region of the swing frame 20 (the number of the vertical roller mechanisms 26 is 4). is not limited). Each of the vertical roller mechanisms 26 is composed of a pair of upper and lower rollers (26a, 26b). The outer bucket 30 is positioned vertically while allowing the rotation of the outer bucket 30 .

Furthermore, the swing frame 20 is equipped with an electric motor 27 . This electric motor 27 is attached to a support plate 28 fixed to a portion of the swing frame 20 . The electric motor 27 has a drive gear (not shown) at the tip of its output shaft (not shown).

As shown in FIGS. 4A and 4B, the inner bucket holding container (outer bucket) 30 is formed as a generally bottomed cylindrical container body with an open upper end. A brim-shaped upper flange portion 32 is provided on the outer peripheral region of the upper end opening 31 of the outer bucket 30, and a brim-shaped lower flange portion 34 is provided on the outer peripheral region of the bottom wall portion 33 of the outer bucket 30. ing. The upper flange portion 32 is a portion with which the four horizontal roller mechanisms 24 provided at the four corners of the upper region of the swing frame 20 come into contact. The lower flange portion 34 is a portion with which the four horizontal roller mechanisms 25 provided at the four corners of the lower region of the swing frame 20 abut, and the vertical roller mechanisms 26 of the swing frame 20 are in contact with the lower flange portion 34 . It is also a portion sandwiched between the upper and lower rollers (26a, 26b). Further, as shown in FIG. 4B, the bottom wall portion 33 of the outer bucket 30 has a large through-hole 35 located in the center and four small through-holes 36 arranged on four sides of the large through-hole 35. and are formed through.

As shown in FIG. 4(A), four tab engaging portions 37 are provided along the peripheral edge of the upper end opening 31 of the outer bucket 30 at equal angular intervals of 90° along the circumferential direction. . Each tab engaging portion 37 is composed of a pair of engaging pieces (37a, 37b) facing each other. 42 (see FIGS. 5 and 6) can be inserted and arranged.

In addition, an annular gear portion 38 is formed around the outer circumference of the outer bucket 30 at a middle position in the height direction of the outer circumference of the main body of the outer bucket 30 . A chain (not shown) for transmitting the driving force of the electric motor 27 to the outer bucket 30 is wound around the annular gear portion 38 . That is, the chain forms an endless track that connects the annular gear portion 38 of the outer bucket 30 and a drive gear (not shown) at the tip of the output shaft of the electric motor 27 . The driving force of the electric motor 27 is transmitted to the outer bucket 30 via this chain, so that the outer bucket 30 is rotationally driven about the central axis C with respect to the swing frame 20 . In other words, the electric motor 27, the annular gear portion 38, and the chain constitute driving means for rotationally driving the inner bucket holding container (outer bucket) 30. As shown in FIG.

As shown in FIGS. 5A, 5B, and 6, the inner bucket 40 is a generally bottomed cylindrical metal (for example, stainless steel) container body. The inner bucket 40 has an opening formed at its upper end 41 (FIG. 6), forming an open container capable of accommodating the powder to be dried.

A total of four tabs (plate piece-like protrusions) 42 are protruded from the outer circumference of the upper end of the inner bucket 40 . These four tabs 42 are provided corresponding to the four tab engaging portions 37 of the outer bucket 30, respectively. When the inner bucket 40 is housed in the outer bucket 30 (see FIG. 7), each tab 42 of the inner bucket 40 engages with a pair of engaging pieces (37a, 37b) of the corresponding tab engaging portion 37 of the outer bucket 30. ) and sits in the tab engaging portion 37 . Then, the inner bucket 40 is accommodated and held inside the outer bucket 30 in a state in which the central axes (C) of both buckets 30 and 40 are aligned and both buckets cannot rotate relative to each other (that is, can rotate integrally).

As shown in FIGS. 5A and 5B, the bottom wall portion 43 and the outer peripheral wall portion 44 of the inner bucket 40 are provided with a plurality (four in this example) of circulation paths 45A to 45D for the heating fluid. It is Each of the four flow passages 45A-45D has a quarter area of the circular bottom wall surface and adjoins that quarter bottom wall area (corresponding to a quarter of the total circumference). It is set as a meandering path that straddles the outer peripheral wall area. For example, focusing on the flow path 45A assigned to the upper left quarter of the inner bucket bottom wall portion 43 shown in FIG. An entry-side coupler 51 (an entry-side plug-like connector) provided on the bottom wall portion 43 serves as an end point. Then, the flow path 45 starting from the inlet side coupler 51 is
“A path 52 extending radially outward through the bottom wall portion 43, followed by a path 53 extending upward from the bottom wall side of the outer peripheral wall portion 44 toward the upper end, followed by a path 53 extending from the bottom wall side toward the upper end of the outer peripheral wall portion 44, and then folding back the outer peripheral wall portion 44 near its upper end to the upper end. A path 54 descending from the side toward the bottom wall followed by a path 55 extending radially inwardly through the bottom wall 43 until reaching a radially intermediate turn-up 56 of the bottom wall 43."
as one meandering unit, the flow path 45 reaches the output side coupler 57 after repeating the meandering a plurality of times. Thus, the inner bucket 40 of the present embodiment is provided with four flow passages 45 as described above, so that most of the outer peripheral wall portion 44 of the inner bucket 40 and the bottom wall portion 43 adjacent to the outer peripheral wall portion 44 are It is possible to evenly heat the portion close to the outer peripheral wall portion.

As shown in FIGS. 5 and 6, the bottom wall portion 43 of the inner bucket 40 is provided with four guards (protective members) 46 projecting downward from the bottom wall surface. Each of the four guards 46 has a cylindrical shape (more specifically, an elongated cylindrical shape) and is connected to the inlet coupler 51 (or the outlet coupler) of one of the two adjacent meandering flow paths 45. 57) and the inlet side coupler 51 (or the outlet side coupler 57) of the other flow path.

FIG. 7 is a cross-sectional view showing a state in which the inner bucket 40 is housed and held inside the outer bucket 30 (however, FIG. 7 does not depict the swing frame 20 that supports the outer bucket 30). As shown in FIG. 7, the tabs 42 of the inner bucket 40 are engaged with the four tab engaging portions 37 of the outer bucket 30, respectively, so that the inner bucket 40 cannot rotate relative to the outer bucket 30. (That is, it is held in a state in which it can rotate integrally). At this time, the four guards 46 provided on the bottom wall portion 43 of the inner bucket 40 are arranged to face the four small through holes 36 provided on the bottom wall portion 33 of the outer bucket 30, respectively. Thus, the inlet side coupler 51 and the outlet side coupler 59 of the four flow passages 45A to 45D can be connected to a distribution/recovery mechanism 60 to be described later through the small through hole 36. FIG.

As shown in FIGS. 7 and 8, below the inner bucket 40 and the outer bucket 30, there are provided pipes for distributing the heating fluid to the four flow passages 45A to 45D and recovering the heating fluid from each flow passage 45. A distribution/collection mechanism 60 is provided. This distribution/collection mechanism 60 consists of a central partition 61, a rotary joint 62 disposed directly below it, and a number of piping systems (63-65) extending inside and outside the central partition 61 and rotary joint 62. It is configured.

The central partition portion 61 is arranged in the large through hole 35 of the outer bucket bottom wall portion 33 and is positioned against the central portion of the inner bucket bottom wall portion 43 and the outer bucket bottom wall portion 33 around the large through hole 35 . Connection is fixed. The interior of the central partition 61 is divided into a lower chamber 61a and an upper chamber 61b. The lower chamber 61 a is a relay chamber that temporarily receives relatively high-temperature heating fluid supplied from the heating fluid supply source 70 via the rotary joint 62 . On the other hand, the upper chamber 61b is a relay chamber that receives and collects the relatively low-temperature heating fluid returned from each flow passage 45. As shown in FIG.

A rotary joint generally refers to a rotary coupling device for conveying a fluid flowing through a fixed pipe to a rotating body, and is commercially available. The rotary joint 62 used in this embodiment includes a hollow shaft portion 62a connected to the central partition portion 61 on the side of the rotating body, and a housing portion 62b partitioning an annular passage around the shaft portion 62a. (See Figure 8). An annular passage in the housing portion 62b connects the external heating fluid supply source 70 and the lower chamber 61a of the central partition portion 61, and serves as a supply passage for guiding the heating fluid from the supply source 70 to the lower chamber 61a. work. On the other hand, a passage formed through the center of the shaft portion 62a connects the upper chamber 61b of the central partition portion 61 and the heating fluid supply source 70, and the heating fluid collected in the upper chamber 61b is transferred to the heating fluid supply source. Acts as a collection path back to 70.

Various heating fluid sources 70 may be selected depending on the heating fluid used. For example, when using steam at a high temperature (for example, about 120 to 150° C.) as the heating fluid, a steam generation type boiler can be used as the heating fluid supply source 70 . Alternatively, hot water (eg, 70-80° C.) or oil can be used as the heating fluid.

As shown in FIG. 8, heated fluid (e.g., hot steam) from a heated fluid supply 70 enters the annular passage through a side inlet 62c of the rotary joint 62 and passes through the annular passage to the central compartment 61. is introduced into the lower chamber 61a. Four supply pipes 63 (only one is shown in FIG. 8) are connected to the lower chamber 61a. It is guided to each incoming coupler 51 of 45A-45D. The heating fluid guided to the inlet coupler 51 reaches the corresponding outlet coupler 57 via the meandering flow path 45 along the bottom wall and the outer peripheral wall of the inner bucket 40 . The heated fluid reaching each outlet coupler 57 is guided to the upper chamber 61b of the central partition 61 via each recovery pipe 64 (only one is shown in FIG. 8). The heated fluid collected in the upper chamber 61b (having a relatively lower temperature than the heated fluid in the lower chamber 61a) is sent through a central pipe 65 located in the center of the central partition 61 to the shaft portion 62a of the rotary joint. , and returned to the heating fluid supply source 70 from the lower end outlet 62d of the rotary joint 62 via the central passage of the shaft portion 62a. The heated fluid (for example, steam) returned to the heated fluid supply source 70 is reheated in a boiler or the like, regenerated as a high-temperature heated fluid, and supplied toward the rotary joint 62 again. By circulating the hot heating fluid between the inner bucket 40 of the drying apparatus and the heating fluid source 70 in this manner, the inner bucket 40 can be efficiently and continuously heated.

FIG. 1 shows the entire drying apparatus assembled from the above-described support frame 10, swing frame 20, inner bucket holding container (outer bucket) 30 and inner bucket 40 (however, in FIG. 1, the heating fluid is distributed). (The recovery mechanism 60 is omitted). In the drying apparatus of FIG. 1, the swing frame 20, the outer bucket 30, and the inner bucket 40 are supported on the support frame 10 so as to be tiltable about a horizontal support shaft 22. As shown in FIG. In addition, the outer bucket 30 and the inner bucket 40 are integrally rotatable with respect to the swing frame 20 about the central axis C common to both buckets. Synchronously rotated by the driving means. Incidentally, in the drying apparatus of this embodiment, the center axis C of the outer bucket 30 (and the inner bucket 40) is orthogonal to the horizontal support shaft 22 of the swing frame 20. It is always maintained regardless of the inclination angle of the body 20 or the like.

9, 10 and 11 are diagrams for explaining a series of procedures of drying work using the drying apparatus of the present embodiment, and are schematic cross-sectional views focusing particularly on the inclination angles of the inner bucket 40 and the outer bucket 30. It is a diagram.

FIG. 9 shows the state during standby or during loading of the powder to be dried. In this standby state, the inner bucket 40 and the outer bucket 30 of the drying device maintain an upright posture (that is, a posture in which the central axes C of both buckets stand at 90° to the horizontal installation surface S). A predetermined amount of undried powder is carried into the inner bucket 40 in this upright position. Alternatively, an inner bucket 40 containing undried powder in advance is set against the outer bucket 30 in an upright posture.

Next, as shown in FIG. 10, the inner bucket 40 and the outer bucket 30 are tilted together with the swing frame 20 to a predetermined tilt angle .theta., and the attitude of the inner bucket 40 etc. is fixed at the tilt angle .theta. This tilting operation is performed by pulling the wire or rope connected to the connector 23 of the swing frame 20 . The inclination angle θ formed by the horizontal installation surface S and the central axis C is, for example, the angle just before the powder in the inner bucket 40 spills out from the upper opening edge of the inner bucket 40 (see FIG. 10, in which θ is 45°). The smaller the inclination angle θ (that is, the closer the inclination of the inner bucket 40 is to the horizontal), the larger the contact area between the inner wall surface of the inner bucket 40 and the powder, and the more efficient (reduced time) of drying. be done. In other words, by reducing the amount of powder carried into the inner bucket 40, the inclination angle θ can be made smaller, and the drying time can be shortened.

By activating the electric motor 27 while the inner bucket 40 and the like are held at the tilt angle θ, the outer bucket 30 and the inner bucket 40 are rotationally driven about the tilted central axis C. Along with this rotation, a heated fluid (for example, high-temperature steam) is continuously circulated through all the flow passages 45A to 45D of the inner bucket 40, so that the powder in the inner bucket 40 is heated and dried. The inner peripheral wall surface of the inner bucket 40 revolves around the inclined central axis C as the inner bucket 40 rotates (rotates on its axis). The cycle of contact/non-contact with the powder is repeated at the rotation period corresponding to the rotation speed. In other words, each wall surface portion of the inner peripheral wall surface of the inner bucket 40 has a timing (time period) at which it does not come into contact with the powder for each cycle, and each wall surface portion is moved using the non-contact timing. The temperature can be restored by heat from the heated fluid flowing through the flow passages 45 .

The powder is dried to a desired dryness level by heating and drying for a predetermined time in the inclined state of FIG. After that, as shown in FIG. 11, by greatly tilting the inner bucket 40 and the outer bucket 30 together with the swinging frame 20 (in FIG. 11, the tilt angle θ′ is approximately minus 10°), the dried air is removed from the inner bucket 40. Powder can be carried out.

According to this embodiment, the following effects can be obtained. Namely
(a) By rotating the inner bucket 40 and the outer bucket 30 while maintaining the tilt angle of the inner bucket 40 and the outer bucket 30 at an appropriate tilt angle (θ) according to the amount of powder to be dried. , the powder can be dried efficiently.
(b) Since the inner bucket 40 for containing the powder is configured as an open-type container with an open upper end, the powder can be dried by simply tilting the inner bucket 40 together with the swing frame 20 after the drying operation is completed. The powder can be easily taken out from the inner bucket 40. - 特許庁
(C) The inner bucket 40 is indirectly attached to the swing frame 20 via the outer bucket 30, and the inner bucket 40 is detachable from the outer bucket 30. can be easily removed. Therefore, the inner bucket 40 alone can be used for work such as cleaning that accompanies the change of product type. Also, if a plurality of inner buckets 40 are prepared in advance, it is possible to minimize the loss of work time associated with the change of product type.

10 support frame 20 swing frame 22 horizontal support shaft 27 electric motor (driving means)
30 inner bucket holding container (outer bucket)
40 Inner buckets 45A, 45B, 45C, 45D Flow path 60 for heating fluid Distribution/recovery mechanism 61 Central partition 62 Rotary joint 70 Supply source S for heating fluid Installation surface C Central axis

Claims (4)

An apparatus for drying powder, comprising:
a support frame installed on the installation surface;
a swing frame that is tiltably supported by the support frame via a horizontal support shaft;
an inner bucket holding container rotatably supported about the central axis with respect to the swing frame;
an inner bucket as an open-type container that is detachably housed and held inside the inner bucket holding container and that houses the powder as the material to be dried;
driving means for rotationally driving the inner bucket holding container together with the inner bucket housed therein;When,
a rotary joint disposed below the inner bucket holding container; with
At least an outer peripheral portion of the inner bucket is provided with a flow passage for circulating the heating fluid.cage,
A heating fluid flow path set in at least an outer peripheral portion of the inner bucket is connected to a heating fluid supply source via the rotary joint, A powder drying apparatus characterized by: The drive means
a chain wound around the outer circumference of the inner bucket holding container;
an electric motor attached to the swing frame to drive the chain;
2. The powder drying apparatus according to claim 1, comprising: 3. The powder drying apparatus according to claim 1 , wherein said heating fluid is steam, hot water, or oil. powder A method for drying powder using the drying device of
The powder drying device used in the method is
a support frame installed on the installation surface;
a swing frame that is tiltably supported by the support frame via a horizontal support shaft;
an inner bucket holding container rotatably supported about the central axis with respect to the swing frame;
an inner bucket as an open container that is detachably housed and held inside the inner bucket holding container and that houses the powder as the material to be dried;
driving means for rotating the inner bucket holding container together with the inner bucket housed therein;
A powder drying apparatus, wherein a flow path for circulating a heated fluid is set at least on the outer periphery of the inner bucket,
The method is
While maintaining the inner bucket holding container and the inner bucket accommodated and held therein in an inclined posture, rotating the inner bucket holding container and the inner bucket in the inclined posture by the driving means, and The powder stored in the inner bucket is dried while a heated fluid is circulated through the flow passage on the outer periphery of the inner bucket.is a
A powder drying method characterized by:

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