JP2000127153A - Dehumidifying dryer of powder particle material using thermal conduction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To broaden a heat transfer area, to heat with a good thermal efficiency without temperature unevenness and to uniformly dehumidify and dry, by forming a structure in which a plurality of partition walls of a thermal conduction wall of a dry hopper are extended toward an interior, and heating an outer periphery of the wall formed of a good thermal conductive material. SOLUTION: A powder particle material supplied into a dry hopper 1 is heated by conduction heats of a thermal conductive wall 2, a thermal conductive cylinder 4 and partition walls 6, 7 respectively heated by an outside heating means 3 of an outer periphery of the wall 2, and an inside heating means 5 at a center of the cylinder 4, dehumidified and dried. When the material is introduced from above the material is not retained at an upper end face of the wall 6, equivalently dispersed and filled in the walls 6, 7 without difficulty. A lower oblique cutout 62 is formed at a lower end of the wall 6, a surface area of the wall 6 is increased in its thermal conduction area to match a gradient of a tapered part 9 to raise its thermal conduction effect. Thus, the material is heated without temperature unevenness, uniformly dehumidified and dried to broaden its thermal conduction heating surface area, thereby improving its thermal efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for dehumidifying and drying a particulate material using heat conduction capable of uniformly dehumidifying and drying the particulate material.

[0002]

2. Description of the Related Art FIG. 15 shows a conventional apparatus for dehumidifying and drying a granular material. In this method, a plurality of pipe heaters 102 for heating and drying the powder material are disposed inside a drying hopper 101, and a band heater 105 is disposed between an inner hopper 103 and an outer hopper 104. Then, the particulate material supplied from the collector 107 into the internal hopper 103 via the valve 106 is heated and dehumidified and dried by the pipe heater 102 and the band heater 105 as described above.

However, in this method, since the powder material is directly heated by the pipe heater 102 and the band heater 105, the powder material cannot be heated uniformly, and the There is a problem that unevenness occurs in drying. Further, there is a problem that the structure is complicated, and it is difficult to form the upper and lower divided structure, and it is difficult to perform maintenance.

[0004] Japanese Patent Application Laid-Open No. 6-114834 describes a dehumidifying and drying apparatus for synthetic resin particles by a vacuum heating method. This is because, as shown in FIG. 16, a supply port 201 having a mechanism for sucking up synthetic resin particles as a raw material is provided at the uppermost end of the dehumidifying / drying device, and a lower portion thereof is provided via an upper automatic opening / closing bubble 204 so as to be doubled. There is a vacuum dehumidifying / drying apparatus main body 207 having a structure, and a P.O. T. C. There is a heat exchanger 208 composed of a foldable pipe 210 with a built-in fold and a heat pipe 211,
There is a storage tank 212 for temporarily changing the raw material via an automatic opening / closing valve 222 under step closing, and a vertical type is formed at the bottom end up to a flange 214 attachable to a synthetic resin molding machine, which is dehumidified and dried. Synthetic resin powder for a short time,
It enables continuous automatic supply with energy saving.

[0005] However, in this case, the P.V. T. C Since the heat exchanger 208 having a complicated configuration composed of the pipe 210 with a built-in wall and the heat pipe 211 is provided at a plurality of locations, the structure is complicated and the upper and lower divided structures cannot be formed. There was a problem that it was difficult to clean the 208 part.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, has a simple structure, is robust, has a large heat transfer area, improves thermal efficiency, and can have a vertically divided structure. Dehumidification of particulate materials, which is easy to perform cleaning and cleaning during maintenance and material change, can heat particulate materials gently and without temperature unevenness, and can uniformly dehumidify and dry particulate materials It is intended to provide a drying device.

[0007]

According to a first aspect of the present invention, there is provided an apparatus for dehumidifying and drying a powdery or granular material, comprising: a drying hopper formed of a material having a good thermal conductivity; The heating means is provided on the outer periphery of the wall, and the heat conduction wall has a structure in which a plurality of partition walls extend toward the inside.

[0008] Here, the partition wall is formed in a shape connected vertically, and the heating means is preferably constituted by a band heater, and a nichrome heater or a ceramic heater may be attached to the heat conducting wall. Need not necessarily be provided on the entire outer peripheral surface of the heat conducting wall, but may be provided partially and partially heated. Further, it is preferable to use a material having good heat conductivity such as aluminum for the heat conductive wall.

This dehumidifying and drying apparatus pays attention to the material itself constituting the conventional drying hopper, and replaces the material with conventional iron or stainless steel and uses a material having better heat conductivity, for example, aluminum. By using the thermal conductivity positively, a heating means (heating means) can be provided at a certain distance from the granular material to be heated.

Conventionally, the existence of a heat conductor that connects the heating means and the object to be heated has not been actively considered. Therefore, in the dehumidifying and drying apparatus shown in the conventional example, the heating means is arranged so as to be as close as possible to the object to be heated in order to heat the object to be heated as uniformly as possible. In other words, in the drying hopper,
P. T. A heat exchanger having a complicated configuration in which a heat pipe is further provided on the pipe with a built-in wall was arranged throughout.

However, with such a structure, the structure becomes complicated and the heat pipe transmits heat in the vertical direction, so that the heating means cannot be divided into upper and lower parts. On the other hand, in the dehumidifying and drying apparatus of the present invention, the heating means is, in principle, provided only outside the heating hopper, and actively uses the heat from the heating means to increase the thermal conductivity of the material constituting the heating hopper. Utilization is intended to spread to every corner of the granular material in the drying hopper.

For this reason, in this drying hopper, a plurality of partition walls extend inward from the inner periphery of the cylindrical heat conducting wall constituting the drying hopper. This partition wall is made of the same material as the heat conduction wall, and gently conducts the heat given by the heating means toward the center by heat conduction without unevenness in temperature, and removes the powder material inside. Heat gently. Further, the partition wall has a predetermined thickness so that heat conduction is efficiently performed, and the sections of the internal space of the drying hopper partitioned by the partition wall have substantially the same sectional area, respectively. In such a manner, the powder material is uniformly heated, and is divided as finely as possible, so that the heat transfer area is widened and the heat efficiency of heating is improved.

However, as described above, the partition walls do not necessarily have to have the same sectional area of the small sections, nor do they need to be finely divided. Further, a feature of the heating method in the dehumidifying / drying apparatus is that, as in a heat pipe or the like, the direction of heat transfer from the heating means (heat source) is mainly in the horizontal direction, not in the vertical direction.

In this way, the heating means can be separated from the object to be heated by a certain distance, so that the inside of the drying hopper has a simple structure consisting only of a partition wall extending only in one direction, and a heat pipe or the like. However, since the direction of heat transfer is horizontal, the heat can be easily divided vertically. In addition, the idea of the dehumidifying and drying apparatus is, in addition, to shorten the heating time,
From the idea of providing a heating means as densely as possible to the object to be heated for efficiency and uniform heating, we focus on the heat conductivity of the material such as temperature uniformity and gentleness of heating. The idea was to separate the means, and by optimizing the structure of the partition walls, etc., overall, the heating efficiency was comparable to that of direct heating, while the effect of simplifying the structure was achieved. It is obtained.

According to a second aspect of the present invention, in the first aspect, the upper end of each of the partition walls extending from the heat conducting wall to the internal space has a valley at the center of the internal space. An upper diagonal notch which is inclined downward is formed as a part, and each lower end of the partition wall has a structure in which a lower diagonal notch which is inclined downward with the center as a valley is formed.

Since the upper end of the partition wall is formed in the upper oblique notch, when the granular material is introduced from above, the material does not stay on the upper end surface of the partition wall, and the granular material is easily removed. It can be evenly dispersed and filled in the partition wall. Further, since the lower end of the partition wall is formed in the lower oblique notch, the heat conduction area increases. In addition, the lower oblique cutout is determined according to the shape of the lower part of the hopper where the partition wall is close, the shape of a first-in first-out umbrella, and the like. Is to increase. Therefore, depending on the degree of demand for the heat conduction area, it is not always necessary to provide a notch along the shape of the mating member.

The upper diagonal notch is for preventing the accumulation of the powdery material, and the upper diagonal notch may not be necessarily provided as long as the same function is exhibited. For example, the upper end surface of the partition wall may be horizontal, and chamfering may be provided so that the granular material does not stay, or R chamfering may be provided. The device for dehumidifying and drying a granular material according to claim 3 is provided with a heat conduction tube formed of a material having good heat conductivity and having a built-in heating means inside a drying hopper, wherein the heat conduction tube is The structure is characterized in that a plurality of partition walls extend from the center of the powdery material storage popper toward the inner wall.

Here, the partition wall has a shape connected in the vertical direction, and the heating means is preferably constituted by a pipe heater, and may be a nichrome heater or a ceramic heater. Further, it is preferable to use a material having good heat conductivity such as aluminum for the heat conductive wall.

The inventive idea of the dehumidifying and drying apparatus is also described in claim 1.
This is the same as the dehumidifying and drying apparatus described in (1). The difference is that, in this apparatus, a heat conducting tube having a built-in heating means is placed at the center of the drying hopper, and a partition wall extends from the heat conducting tube toward the inner wall of the drying hopper. It is. The granular material supplied into the drying hopper is indirectly gentle and temperature uneven due to the heat conduction wall heated by the built-in heating means and the heat conducted from the heat conduction wall to the partition wall. And dried uniformly.

According to a fourth aspect of the present invention, there is provided the apparatus for dehumidifying and drying a powdery or granular material according to the third aspect, wherein the heat conductive partition wall has a projection whose upper end is inclined downward toward the periphery with the center as the top. One end is formed, and the lower end forms a lower oblique notch which is inclined downward toward the periphery with the center of the drying hopper at the top. Since the upper end of the partition wall is formed at the end of the protruding piece that is inclined downward toward the periphery, when the granular material is charged from above,
This powder material can be easily and evenly dispersed and filled into the partition wall without the material staying at the upper end surface of the protruding piece end.

Further, since the lower end of the partition wall is formed in the lower oblique notch, it is convenient to provide a first-in first-out umbrella portion. In addition, this protruding piece end is for preventing stagnation of the granular material, as long as the same function is exhibited.
It is not always necessary to provide such a protruding end. For example, the upper end surface of the partition wall may be horizontal, and chamfering may be provided so that the granular material does not stay, or R chamfering may be provided.

In the apparatus for dehumidifying and drying a granular material according to a fifth aspect of the present invention, in any one of the first to fourth aspects, the drying hopper has a structure capable of being divided into a plurality of portions in a vertical direction. As described above, since the drying hopper can be divided into a plurality of portions in the vertical direction, maintenance such as disassembly and cleaning can be easily performed. In the apparatus for dehumidifying and drying a granular material using heat conduction according to claim 6, the drying hopper according to claim 5, wherein the drying hopper removes a partition wall extending from a heat conduction wall of a vertically divided portion. It does not overlap vertically.

In this apparatus, for example, of the two divided sections, the upper partition wall and the lower partition wall having the same shape are not overlapped with each other up and down, and each partition wall is formed by another partition wall. Partition the center of the compartment to be partitioned. In this way, when the granular material moves from the upper section to the lower section, the horizontal partitioning of the granular material in the section is performed, and in the lower section, the upper section directly The granular material that has not been in contact with the partition wall comes into direct contact with the lower partition wall, and heat conduction heating is performed more uniformly.

According to a seventh aspect of the present invention, there is provided the apparatus for dehumidifying and drying a granular material according to any one of the fifth and sixth aspects, wherein the drying hopper is provided with an independent heating means in a vertically divided portion. Structure. This apparatus can control the material in the hopper by changing the heating temperature in the upper, middle, and lower stages.

[0025] According to an eighth aspect of the present invention, in the apparatus for dehumidifying and drying a powdery or granular material according to any one of the first to seventh aspects, the drying hopper is made of an aluminum material or the like, which has good thermal conductivity and can be heated. It is formed of a material that does not adversely affect the granular material. Since the granular material is heated using the thermal conductivity of the material constituting the drying hopper, the heating means and the granular material to be heated can be separated to a certain extent.

Further, the heating means such as a heat pipe made of copper or the like may have an adverse effect on the granular material to be heated. However, when the heat conducting wall and the partition wall are formed of a material such as aluminum material. There is no such thing. An apparatus for dehumidifying and drying a granular material according to claim 9, wherein the drying hopper is formed of an aluminum material according to claim 8,
The surface is subjected to a surface hardening treatment such as alumite.

As described above, when the surface is subjected to a surface hardening treatment such as alumite, the adverse effect on the material is further reduced, and
Excellent durability and long lasting. An apparatus for dehumidifying and drying a granular material according to a tenth aspect has a structure in which, in any one of the first to eighth aspects, the drying hopper is provided with an outside air intake and a vacuum pump.

By setting the inside of the drying hopper to a vacuum state with the vacuum pump and performing gas replacement during the vacuum drying, the gas required for dehumidification can be saved and the drying efficiency can be increased. This gas replacement is an alternative to the conventional ventilation method in which air that has been heated and dried is passed through a drying hopper to dry the granular material, and the heating of the granular material is performed by the heat of the present invention. Conduction heating method, and further, by replacing the air containing water vapor etc. generated from the granular material in the drying hopper with a gas whose humidity, temperature or composition is adjusted from the outside, the granular material It improves the drying efficiency of the material. In the case of vacuum, specifically,
The operation of sucking the internal air by the vacuum pump by the amount of the adjusting gas introduced from the outside and maintaining the internal vacuum degree is performed.

That is, the gas replacement here means that a gas such as dried air from the outside is replaced with a gas such as humid air in the drying hopper. In this way, unlike the ventilation method, there is no need to constantly flow a large amount of air, and as described above, gas saving,
Drying efficiency can be improved. An apparatus for dehumidifying and drying a granular material according to claim 11 has a structure in which the drying hopper is provided with an air supply receiving port and an opening valve in any one of claims 1 to 8.

In this apparatus, the above gas replacement is applied to the case of the atmospheric pressure, and the inside of the drying hopper is set to the atmospheric pressure, and the gas replacement is performed at the time of the atmospheric pressure drying to save the gas necessary for dehumidification. Drying can be made more efficient.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dehumidifying and drying apparatus for a granular material according to the present invention will be described below with reference to the drawings. FIG. 1 shows a drying hopper, which is a main part of a dehumidifying and drying apparatus for a granular material according to an embodiment of the present invention, wherein (a) is a plan view, (b) is a longitudinal sectional view, and FIG. A system diagram showing the entire configuration of a floor-standing type of the particulate material dehumidifying / drying device of the embodiment, (b) is a system diagram showing the entire configuration of the on-machine type of the particulate material dehumidifying / drying device of the embodiment, 3A and 3B show a main body of the dehumidifying and drying apparatus for a granular material according to the embodiment, in which FIG. 3A is a front view with a part cut away, and FIG. 3B is a side view thereof.

As shown in FIGS. 1A and 1B, the apparatus for dehumidifying and drying a granular material according to the present embodiment is formed of a material having good heat conductivity such as an aluminum material on the outer peripheral portion of a drying hopper 1. A heat conduction wall 2 formed of a material having good heat conductivity such as an aluminum material is provided inside the drying hopper 1 while an external heating means 3 comprising a band heater is provided on the outer periphery thereof. An internal heating means 5 composed of a pipe heater is provided in the center of the apparatus.

A plurality of vertically extending partition walls 6 are extended radially toward the center of the heat conduction wall 2 at substantially the same thickness and at substantially the same intervals on the heat conduction wall 2. Has a plurality of vertically extending partition walls 7 extending radially from the center toward the heat conduction wall 2 constituting the inner wall at substantially the same thickness and at substantially the same interval. , 7 may be provided with an appropriate interval such that the granular material does not stop, or may be in contact with each other.

In this way, a small section is generated, which is divided by the heat conduction wall 2, the heat conduction cylinder 4, and the partition walls 6, 7, but the cross-sectional areas are substantially equal, and the conduction heat from the heat conduction wall 2 and the like is reduced. The powder is uniformly transmitted to the granular material inside the small compartment. In addition, as much as possible, the partition walls 6 and 7 are provided to increase the surface area for heat conduction and improve the heat conduction efficiency. Further, the partition walls 6 and 7 have a certain thickness in consideration of the thermal conductivity of the material so that the heat applied to the heat conductive wall 2 and the like is transmitted to the ends of the partition walls 6 and 7 without unevenness in temperature. Have.

The partition walls 6 and 7 do not necessarily have to have substantially the same thickness and extend at substantially the same intervals. Here, comparing the thermal conductivity of the materials, when the temperature is 20 degrees Celsius, carbon steel conventionally used for a drying hopper is 37 Kcal / mhr ° C, and stainless steel is about 20 Kcal / mhr.
° C or lower, whereas aluminum recommended in the present application has a remarkable difference of 175 Kcal / mhr ° C. Pure copper is excellent in terms of thermal conductivity of 360 Kcal / mhr ° C, but in terms of material unit price, direct contact with powder material may adversely affect the material, so appropriate coating treatment is necessary. Therefore, there are many problems to be solved in order to adopt this.

The upper end of each of the partition walls 6 extending from the heat conducting wall 2 toward the inner center side forms an upper oblique notch 61 which is inclined downward with the inner center side as a valley. 6 has a lower diagonal notch 62 which is inclined downward with the center side being a valley. Further, the partition wall 7 of the heat transfer tube 4 has a protruding end 71 whose upper end is inclined downward toward the periphery with the center as the top, and the lower end is formed around the center of the hopper as the top. A lower diagonal notch 72 that is inclined downward toward the bottom is formed.

The heat conducting wall 2 is cylindrical and constitutes the main body of the drying hopper 1. The hopper upper lid 8 is squeezed thereon, and the squeezing is directed downward toward the center. The hopper lower taper portion 9 which is inclined as described above is provided, and is attached and fixed by an attachment bolt (not shown). The heat conduction cylinder 4 is supported and fixed in a suspended state at a central portion of a pipe 10 spanned between inner walls of a lower reinforcing frame 81 of the hopper upper lid portion 8. The shape of the heat conducting wall 2 of the heating hopper 1 is desirably cylindrical, but may be elliptical tubular, rectangular tubular, or the like.

An umbrella section 12 is attached and fixed to a lower portion of the inner side heating means 5 composed of a pipe heater.
Further, the hopper lower tapered portion 9 has a hollow portion 91 on the inner peripheral portion.
The hollow portion 91 may be further provided with a band heater or the like as a heating means.

Further, the lower part of the partition wall 7 on the central part side is supported by the lower part of the partition wall 6 on the outer peripheral side via a ring 13, and the ring 13 is provided with a material on its upper end surface. If the upper end surface is chamfered, the particulate material does not stay. Further, the hopper upper lid 8 is provided with a level sensor 14 for detecting the level of the granular material supplied into the hopper.

The drying hopper 1 is, for example, as shown in FIG.
As shown in FIG. 2A, it is used for a floor-standing type dehumidifying and drying apparatus for a granular material, and as shown in FIG. 2B, it is used for an on-machine type dehumidifying and drying apparatus for a granular material. . FIG. 2 (a)
Is a floor-standing dehumidifying and drying apparatus for a granular material, which collects the granular material from a nozzle 21 of a material tank to a hopper 22 of a collector and feeds the material into a drying hopper 1 by a material input valve 23. A powder material is supplied.

The powdery material dehumidified and dried in the drying hopper 1 is sent to a hopper 25 of an injection molding machine from a material discharge valve 24 arranged below. A tip of a level gauge 14 for detecting the volume of the granular material in the hopper is provided in the drying hopper 1, and a vacuum pump 27 for evacuating the hopper is provided on the upper side. The pipe 28 is connected to a valve 28 for returning the inside of the drying hopper 1 to the atmospheric pressure.

A valve 29 for introducing outside air for gas replacement is connected to the lower side, and a material transport blower 30 is connected to a lower end of the material discharge valve 24 via a switching valve 31. ing. The on-machine type dehumidifying / drying device for the granular material shown in FIG.
From 1, the particulate material is collected in a hopper 22 of a collector, and supplied to the drying hopper 1 via a material input valve 23.

The powdery material dehumidified and dried in the drying hopper 1 is supplied directly to an injection molding machine from a material discharge valve 24 arranged at a lower portion. In the drying hopper 1, a level gauge 14 for detecting the volume of the granular material in the hopper is provided, and a vacuum pump 27 for evacuating the hopper is connected to the upper side with a pipe. A valve 2 for returning the inside of the drying hopper 1 to atmospheric pressure is connected to the piping.
8 are connected.

A valve 29 for introducing outside air for gas replacement is connected to the lower side. As shown in FIGS. 3A and 3B, the main body of the dehumidifying and drying apparatus for the granular material including the drying hopper 1 is provided with a hopper 22 of the above-described collector on the upper part of the drying hopper 1. 23, and a discharge valve 24 is provided below.

The discharge valve 24 has an air switching valve 31 for controlling the switching of the transport air.
The air switching valve 31 is connected to the blower side of the transport blower 30 by a pipe. The above-mentioned vacuum pump (vacuum pump) 27 is disposed on the side of the transport blower 30, the filter unit 32 is disposed on the upper side thereof, and a control panel for controlling the entire apparatus is disposed on the upper side thereof. 33 are arranged.

According to the apparatus for dehumidifying and drying a granular material of the present embodiment, the granular material supplied into the drying hopper 1
The heat conduction wall 2, the heat conduction cylinder 4, which are heated by the external heating means 3 provided on the outer periphery of the heat conduction wall 2 and the internal heating means 5 provided at the center of the inner heat conduction cylinder 4, respectively. Due to the conduction heat of the partition walls 6 and 7, the partition walls 6 and 7 are heated indirectly and without unevenness in temperature, and are uniformly dehumidified and dried. Further, the granular material in the small section partitioned by the heat conduction wall 2, the heat conduction cylinder 4, and each of the partition walls 6 and 7 has an efficiency due to conduction heat from a surface such as the heat conduction wall 2 surrounding it. Heated.

Further, the upper end of the outer partition wall 6 is formed in the upper oblique notch 61, and the inner partition wall 7 is formed in the protruding end 71. The material does not stagnate on the upper end surface of the partition wall, and the granular material can be easily and uniformly dispersed and filled in the partition walls 6 and 7. The lower end of the partition wall 6 is formed in the lower oblique notch 62, and the partition wall 6 is formed in accordance with the inclination of the tapered portion 9.
Although the heat transfer area is increased by increasing the surface area and increasing the heat transfer area, the heat transfer area may not be provided if the heat transfer area is not so required. The lower end of the partition wall 7 has a lower oblique notch 7
2, it is convenient to provide a first-in first-out umbrella part, and the heat conduction area is increased.

In addition, since the drying hopper 1 is formed of a material such as an aluminum material having good thermal conductivity and having no adverse effect on the granular material upon heating, the drying hopper 1 is made of a copper heat pipe or the like. The heating means may adversely affect the granular material to be heated, but the heat conductive wall 2, the heat conductive cylinder 4, and the partition walls 6 that directly contact the granular material,
7 is made of a material such as an aluminum material, so that is not the case.

The drying hopper 1 is preferably formed of an aluminum material, and the surface thereof is preferably subjected to a surface hardening treatment such as alumite. In addition, there is an advantage that the material has less adverse effect and that it has excellent durability and long life. In addition, the heating means 3 and 5 may be configured such that a nichrome heater or a ceramic heater is attached to the heat conduction wall 2 and the heat conduction cylinder 4, and these may be provided partially to perform partial heating.

Further, when an aluminum material or the like is used for the drying hopper 1, it is preferable to use an extrusion material or a drawing material in which the shape of the heat conducting wall and the partition wall is simultaneously formed. By doing so, the surface condition is finished to be smooth, the particulate material does not adhere to the surface, and the particulate material smoothly moves from the upper portion to the lower portion of the drying hopper.

FIG. 4 is a partially cutaway front view showing a main body of a dehumidifying and drying apparatus for a granular material according to another embodiment, and FIG. 5 is a side view thereof. The same members and the same parts as those of the main body (see FIG. 3) in the apparatus for dehumidifying and drying a granular material according to the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The drying hopper 1 in this embodiment has a structure divided into upper and lower stages, and independent heating means 3 and 5 are provided in each part.

Although the drying hopper in this embodiment is divided into upper and lower two stages, it may be divided into three or more stages and a plurality of stages. In the dehumidifying and drying apparatus of the present invention, since the direction of heat transfer from the heating means is mainly horizontal,
The drying hopper can be divided into upper and lower parts, taking advantage of the advantage. As described above, when the drying hopper is divided into a plurality of portions in the vertical direction (up and down direction), maintenance such as disassembly and cleaning can be easily performed.

Further, the vertically divided portions are provided with independent heating means 3 and 5, so that the material in the hopper 1 is heated in the upper, lower or upper, middle and lower stages. It can be controlled by changing the temperature. FIG.
It is a key map showing the place where the example of the drying hopper of two steps of the present invention was seen from the upper part.

As described above, the drying hopper 1 of the dehumidifying and drying apparatus of the present invention can have a two-stage structure, a three-stage structure, or the like. It is also possible not to overlap. FIG. 6 shows a two-stage structure in which the upper heat conduction wall 2 [1], the heating means 3 [1], and the partition wall 6 [1] indicated by [1] are provided.
Upper heat conduction wall 2 [2] shown in [2], heating means 3
[2] conceptually shows the drying hopper 1 composed of the partition wall 6 [2] as viewed from above.

In this device, for example, the upper partition wall 6 [1] and the lower partition wall 6 [2] of the same shape in the two divided sections do not overlap each other vertically, and the respective partition walls are not overlapped. In this case, the center of the section divided by another partition wall is separated. In this way, when the granular material moves from the upper section to the lower section, the horizontal partitioning of the granular material in the section is performed, and in the lower section,
The granular material that was not in direct contact with the partition wall 6 [1] in the upper section comes into direct contact with the lower partition wall 6 [2], and heat conduction heating is performed more uniformly.

Such a method is not limited to two stages, but may be employed in a plurality of stages. In this case, for example, if the partition wall 6 is gradually shifted, more powder and granular material Comes into direct contact with the partition wall, and more uniform heat conduction heating is performed. FIG. 7A is a conceptual diagram showing various extending modes of the partition wall of the drying hopper of the present invention.

As described above, and as described later,
The partition wall of the drying hopper preferably extends radially from the outside to the inside and radially from the inside to the outside.
As shown in FIG. 7A, the partition walls 6A may be provided in a lattice shape, or, as shown in FIG. 7B, the inner circumference of the heat conduction wall is divided at appropriate intervals to be parallel to each other. It may be extended, and partition walls 6B having different extension lengths may be provided.

Although not shown here as a specific example, the radial type is not limited to this example, and has good heat conduction, and makes the powder material inside the drying hopper as uniform as possible. If it is a partition wall that can conduct heat without
Any extension mode may be used. 8 to 1
1 is a plan view showing a drying hopper 1 of another embodiment.

The drying hopper 1 shown in FIG. 8 is provided with a heat conducting wall 2 formed of a material having good heat conductivity such as an aluminum material on the outer peripheral portion of the drying hopper 1, and the outer side of a band heater on the outer periphery thereof. The heating means 3 is provided, and a plurality of vertically-partitioned partition walls 6 are extended radially toward the center of the heat conduction wall 2 at substantially the same thickness at substantially the same intervals.

The drying hopper 1 shown in FIG. 9 is provided with a heat conducting wall 2 formed of a material having good heat conductivity such as an aluminum material on an outer peripheral portion of the drying hopper 1 and an aluminum material or the like inside the drying hopper 1. A heat conducting cylinder 4 is provided, and an inner side heating means 5 composed of a pipe heater is built in the center of the heat conducting cylinder 4, and a plurality of vertically-partitioning partition walls 7 are provided at the center of the heat conducting cylinder 4. And radially extending toward the heat conduction wall 2 constituting the inner wall with substantially the same thickness and substantially the same interval.

In this case, on the outer periphery of the heat conduction wall 2,
It is not necessary to provide a heating means, but it is desirable to provide a heating means. 8 and 9 are used when the outer diameter of the hopper is relatively small. The drying hopper 1 shown in FIG. 10 is provided with a heat conducting wall 2 formed of a material having good thermal conductivity such as aluminum material on the outer peripheral portion of the drying hopper 1, and external heating means 3 comprising a band heater on the outer periphery. And a large-diameter heat conducting cylinder 4 formed of a material having good heat conductivity such as aluminum material inside the drying hopper 1 and having a hollow portion 41 in the center.
The inner side heating means 5A is provided in a state where the inner side heating means 5A is embedded in the cylindrical wall 42 of A.

The cylindrical wall 4 of the large-diameter heat conductive cylinder 4A
2, a plurality of vertically extending partition walls 7 are extended toward the heat conducting wall 2 at substantially the same thickness and at substantially the same intervals, and a plurality of vertically up and down radially inwardly toward the center. The internal partition walls 7A extending in the direction are extended at substantially the same thickness and at substantially the same interval, and the heat conductive wall 2 is provided with a plurality of vertically extending partition walls 6 radially toward the inner central side. They are extended with substantially the same thickness and at substantially the same interval.

This drying hopper 1 is used when the outer diameter of the hopper is relatively large. The drying hopper 1 shown in FIG. 11 is provided with a heat conducting wall 2 formed of a material having good heat conductivity such as an aluminum material on an outer peripheral portion, and an external heating means 3 including a band heater on the outer periphery thereof. A heat conducting cylinder 4 made of a material having good heat conductivity such as aluminum is provided inside the drying hopper 1, and an inner side heating means 5 composed of a pipe heater is built in a central portion thereof. 2 and the heat conducting tube 4 are connected by a plurality of radial partition walls 67.

As described above, the heat conduction wall, the heat conduction cylinder, and the partition wall form the smallest section as small as possible with the same cross-sectional area in order to uniformly heat the powder material contacting the surface by heat conduction. It is not limited to the above-mentioned shape pattern. In addition, as shown in FIG. 12, the heating element 50 may be installed on the inner surface of the partition wall 6 and the heat conduction wall 2 or the like without providing the heating units 3 and 5 or together with the heating units 3 and 5. It may be.

FIGS. 13A and 13B are enlarged longitudinal sectional views illustrating the umbrella portion 12. FIG. Umbrella part 12 shown in FIG.
Is formed such that an inclined surface 65 is formed in a tapered shape toward the center of the lower center of each partition wall 6, and a support protruding piece 66 is projected obliquely downward at a position near the lower end of the inclined surface 65 toward the center. A substantially conical umbrella body 12a is attached to the distal ends of the support protrusions 66.

As shown by the alternate long and short dash line, the lower portion of the umbrella portion 12 is extended along the inner side taper of the hopper lower taper portion 9, and the portion is supported from the taper portion 9. You may. The umbrella section 12 shown in FIG. 13B is provided with a joining section 65 at the lower end of a heating means 5 composed of a pipe heater disposed at the center of the heat conduction cylinder 4, with the lower center side of each partition wall 7 as the center. Diagonal notch 7
2, and the conical umbrella body 12b is attached to the joint portion so as to contact the lower oblique notch 72.

In the dehumidifying / drying apparatus of the present invention, the powder material is basically subjected to heat conduction heating and dehumidifying / drying in a vacuum state, but when the material is charged and discharged, the vacuum pump 27 is used. The inside of the hopper 1 is returned to the atmospheric pressure by the valve 28 provided in the piping section of
The umbrella section 12 implements a first-in, first-out operation of the material as in normal atmospheric pressure.

As shown in the figure, the umbrella bodies 12a and 12b are provided with their upper surfaces provided at a fixed interval from the inclined surface 65, or provided in contact with the lower oblique notch 72, and The material is not stopped. FIG.
The device for dehumidifying and drying a granular material shown in (a) is provided with an outside air inlet with filter 35 at the bottom of the drying hopper 1 via a pipe and a vacuum pump 36 above the drying hopper 1 via a pipe. The structure is provided.

According to this, while gradually introducing outside air from the outside air intake port 35 with the filter, the vacuum pump 36
By making the inside of the drying hopper 1 into a vacuum state by performing gas replacement, the gas required for dehumidification can be saved,
Drying can be made more efficient. The dehumidifying and drying apparatus for a granular material shown in FIG. 14 (b) is provided with an air supply receiving port 37 at the bottom of the drying hopper 1 via a pipe, and is provided with a filter above the hopper 1 via a pipe. The valve 38 is provided.

This dehumidifying and drying apparatus performs dehumidifying and drying while conducting heat conduction under atmospheric pressure.
By setting the inside of the hopper 1 to the atmospheric pressure and performing gas replacement at the time of the atmospheric pressure drying, it is possible to save gas required for dehumidification and to increase drying efficiency. In addition, the said filter is not essential and does not need to provide. An outside air intake port 35 with a filter and an air supply receiving port 37 are provided at the bottom of the drying hopper 1.
Although it is desirable to provide the opening valve 38 above the hopper 1 from the viewpoint of gas replacement flow, it is not necessarily limited to this.

[0071]

According to the apparatus for dehumidifying and drying a granular material using heat conduction according to claim 1, a drying hopper is provided on the outer periphery of a heat conduction wall formed of a material having good heat conductivity. Since the heat conduction wall has a structure in which a plurality of partition walls are extended toward the inside, the powder material supplied into the drying hopper is heated on the outer periphery. By means of the heat conducted from the heat conducting wall heated by the means to the partition wall, it can be heated and indirectly gently and without temperature unevenness, and can be uniformly dehumidified and dried. Further, the partition wall is provided so as to form as small a section as possible, so that the surface area for heat transfer and heating of the granular material is increased, and the thermal efficiency is increased.

According to the second aspect of the present invention, the upper end of each of the partition walls extending from the heat conductive wall to the internal space is positioned at the center of the internal space. A diagonal notch that slopes downward as a valley is formed, and the lower end of each partition wall has a structure that forms a diagonal notch that slopes downward with the center as the valley. Thus, the upper end of the partition wall is diagonally cut. Since the material is formed in the notch, when the granular material is supplied from above, the material does not stay at the upper end surface of the partition wall, and the granular material can be easily dispersed and filled into the partition wall without difficulty. . Further, since the lower end of the partition wall is formed in an oblique notch, the heat conduction area increases, and the thermal efficiency improves.

According to the third aspect of the present invention, there is provided a dehumidifying / drying apparatus for a granular material using heat conduction, wherein a heat-conductive material formed of a material having good heat conductivity is provided inside a drying hopper. A conductive partition wall is provided, and since the heat conductive partition wall has a structure in which a plurality of partition walls extend from the center of the powdery material storage popper toward the inner wall, the powder supplied into the storage hopper is formed. The granular material is heated more efficiently indirectly and without temperature unevenness by the heat conducted to the partition wall from the heat conduction wall heated by the built-in heating means, and is uniformly dehumidified and dried. Can be. Further, the partition wall is provided so as to form as small a section as possible, so that the surface area for heat transfer and heating of the granular material is increased, and the thermal efficiency is increased.

According to the apparatus for dehumidifying and drying a granular material using heat conduction according to the fourth aspect, the upper end of the heat conductive partition wall is inclined downward toward the periphery with the central portion as the top. The end of the protruding piece is formed, and the lower end has a structure in which an oblique notch that is inclined downward toward the periphery with the center of the hopper as the top is in this manner. Since it is formed at the end of the protruding piece that slopes downward, when the granular material is fed from above, the material does not stay at the upper end face of the protruding piece, and this material is forcibly applied to the partition wall. Filling can be evenly dispersed.

Further, since the lower end of the partition wall is formed in an oblique notch, the heat conduction area increases, which is convenient for providing a first-in first-out umbrella portion. According to the apparatus for dehumidifying and drying a particulate material using heat conduction according to claim 5, the drying hopper has a structure that can be divided into a plurality of portions in the vertical direction, so that maintenance such as disassembly and cleaning can be easily performed. Can be.

According to the apparatus for dehumidifying and drying a particulate material using heat conduction according to the sixth aspect, the drying hopper vertically moves the partition wall extending from the heat conduction wall of the vertically divided portion. So that when the particulate material moves from the upper compartment to the lower compartment, the lateral compartmentalization of the particulate material in the compartment is performed, and in the lower compartment Then, the granular material that did not directly contact the partition wall in the upper section comes into direct contact with the partition wall, and heat conduction and heating are performed more uniformly.

According to the apparatus for dehumidifying and drying a particulate material using heat conduction according to claim 7, the drying hopper has a structure in which an independent heating means is provided in a vertically divided portion. Therefore, the heating temperature of the material in the hopper can be controlled to be different in the upper, middle, and lower stages. Claim 8
According to the apparatus for dehumidifying and drying a particulate material using heat conduction described in (1), the drying hopper has good thermal conductivity, such as an aluminum material, and does not adversely affect the particulate material during heating. Since it is formed of a material, a heating means such as a copper heat pipe may have an adverse effect on the granular material to be heated, but as described above, the heat conduction wall and the partition wall are made of an aluminum material or the like. This is not the case if it is made of a material.

According to the ninth aspect of the present invention, the drying hopper is formed of an aluminum material, and its surface is subjected to a surface hardening treatment such as alumite. Therefore, there is less adverse effect on the material, and it is excellent in durability and durable. According to the apparatus for dehumidifying and drying a granular material using heat conduction according to claim 10,
The bottom of the hopper is provided with an outside air intake, and the hopper is equipped with a vacuum pump.This vacuum pump evacuates the inside of the hopper and performs gas replacement during vacuum drying to remove the gas required for dehumidification. Savings and more efficient drying can be achieved.

According to the apparatus for dehumidifying and drying a particulate material using heat conduction according to the eleventh aspect, an air supply receiving port is provided at the bottom of the hopper, and the hopper is provided with an opening valve. By setting the inside of the hopper to atmospheric pressure and performing gas replacement during the atmospheric pressure drying, it is possible to save gas required for dehumidification and to increase drying efficiency.

[Brief description of the drawings]

FIG. 1 shows a drying hopper as a main part of a dehumidifying and drying apparatus for a granular material according to an embodiment of the present invention, wherein (a) is a plan view and (b) is a longitudinal sectional view.

FIG. 2 is a system diagram showing an overall configuration of a floor-standing type of the particulate material dehumidifying / drying apparatus according to the embodiment, and FIG. 2 (b) is an overall configuration of an on-machine type of the particulate material dehumidifying / drying apparatus according to the embodiment. FIG.

FIGS. 3A and 3B show a main body of a dehumidifying and drying apparatus for a granular material according to an embodiment, wherein FIG. 3A is a front view partially cut away, and FIG.
Is a side view thereof.

FIG. 4 is a partially cutaway front view showing a main body of a dehumidifying and drying apparatus for a granular material according to another embodiment.

FIG. 5 is a side view of a main body of the apparatus for dehumidifying and drying a granular material shown in FIG. 4;

FIG. 6 is a conceptual diagram showing an example of a two-stage drying hopper of the present invention viewed from above.

FIGS. 7A and 7B are conceptual diagrams showing various extending modes of a partition wall of the drying hopper of the present invention.

FIG. 8 is a plan view showing another first example of the drying hopper.

FIG. 9 is a plan view showing another second example of the drying hopper.

FIG. 10 is a plan view showing another third example of the drying hopper.

FIG. 11 is a plan view showing another fourth example of the drying hopper.

FIG. 12 is a partial cross-sectional plan view showing a state in which a heating element is installed on the inner surface of the heat conduction wall and the surface of the partition wall of the drying hopper.

FIG. 13 shows an umbrella section provided in a drying hopper,
(A) is a partial enlarged longitudinal sectional view showing a first example, and (b) is a partially enlarged longitudinal sectional view showing a second example.

14A is a schematic external view showing a state in which an outside air intake port is provided at the bottom of a drying hopper and a vacuum pump is provided above the drying hopper, and FIG. 14B is a diagram showing an air supply receiving port provided at the bottom of the hopper. FIG. 3 is a schematic external view showing a state in which an open valve is provided above.

FIG. 15 is a system diagram showing a first example of a conventional apparatus for dehumidifying and drying a granular material.

FIG. 16 is a partially cutaway front view showing a second example of the conventional dehumidifying and drying apparatus for a granular material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying hopper 2 Heat conduction wall 3 External heating means 35 External air intake with filter 36 Vacuum pump 37 Air supply receiving port 38 Opening valve 4 Heat conduction cylinder 5 Internal heating means 6 Partition wall 61 Upper diagonal notch 62 Lower diagonal notch 7 Partition wall 71 Protruding end 72 Lower diagonal notch

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichi Katsumura 1-10-4 Nagao Furniture Town, Hirakata City, Osaka Prefecture Inside the Technology Development Center, Matsui Manufacturing Co., Ltd. (72) Masaaki Nosaka Nagao Furniture Town, Hirakata City, Osaka Prefecture 1-10-4 Matsui Manufacturing Co., Ltd. Technology Development Center (72) Inventor Osamu Matsui 6-5-26 Tanimachi, Chuo-ku, Osaka-shi, Osaka F-term in Matsui Manufacturing Co., Ltd. 4F201 AC01 AJ09 AJ12 AL06 AL13 AL20 AM28 BA04 BC02 BC12 BC15 BC19 BN05 BN23 BQ02 BQ35

Claims (11)

[Claims] 1. A drying hopper for storing and drying a powder material is provided with a structure in which a heating means is provided on the outer periphery of a heat conductive wall formed of a material having good heat conductivity. A device for dehumidifying and drying a granular material using heat conduction, wherein a plurality of partition walls are extended toward the inside. 2. The upper end of each of the partition walls extending from the heat conducting wall to the internal space, the upper end of the partition wall being inclined downward with the center of the internal space being a valley portion. A dehumidifying / drying device for a particulate material using heat conduction, wherein each lower end of the partition wall has a structure in which a lower diagonal notch is formed to be inclined downward with the center as a valley. 3. A drying hopper for storing and drying the powdery and granular materials is provided with a heat conducting tube formed of a material having good heat conductivity and having a built-in heating means. An apparatus for dehumidifying and drying a granular material using heat conduction, wherein a partition wall has a structure extending from a center portion of the drying popper toward an inner wall. 4. The heat conductive partition wall according to claim 3, wherein an upper end portion of the partition wall has a protruding end which is inclined downward toward the periphery with the center portion as a top portion, and a lower end portion of the drying hopper. An apparatus for dehumidifying and drying a powdery or granular material using heat conduction, characterized in that it has a structure in which a lower oblique notch that is inclined downward toward the periphery with its center at the top is formed. 5. An apparatus according to claim 1, wherein said drying hopper has a structure capable of being divided into a plurality of portions in a vertical direction. 6. The powder using heat conduction according to claim 5, wherein the drying hopper does not vertically overlap a partition wall extending from a heat conductive wall of a vertically divided portion. Dehumidifying and drying equipment for granular materials. 7. A method according to claim 5, wherein said drying hopper has a structure in which an independent heating means is provided in a vertically divided portion. A dehumidifying and drying device for granular material. 8. The drying hopper according to claim 1, wherein the drying hopper is made of a material such as an aluminum material, which has good thermal conductivity and does not adversely affect the granular material when heated. An apparatus for dehumidifying and drying a granular material using heat conduction. 9. The powdery or granular material using heat conduction according to claim 8, wherein the drying hopper is formed of an aluminum material, and the surface thereof is subjected to a surface hardening treatment such as alumite. Dehumidifying and drying equipment. 10. An apparatus for dehumidifying and drying a particulate material using heat conduction according to any one of claims 1 to 9, wherein said drying hopper is provided with an outside air intake and a vacuum pump. . 11. A dehumidifying and drying method for a particulate material using heat conduction, according to any one of claims 1 to 9, wherein said drying hopper is provided with an air supply receiving port and an opening valve. apparatus.