JP2003042659A - Coated foil drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coated foil drier wherein there are provided a plurality of heat exchange passages capable of demonstrating a heat exchange function of endowing a water containing coated foil of an object to be dried with heat and a stirring/conveyance function of stirring and conveying the article axially of a drying housing, and such an article is dried up to a predetermined water content, and further the manufacturing cost is more reduced than in a prior art drying apparatus with easy adjustment and control for the flow rate of heating gas. SOLUTION: A coated foil drier 1A comprises a heat gas supply housing 2 and a heat gas recovery housing 6, a rotating housing 3 disposed rotatably with a rotary drive section 4 between both housings 2, 6, and a plurality of heat exchange passage sections 5 disposed at a predetermined interval peripherally S of an inner surface 301 of a peripheral wall 3a of the rotating housing 3, each with a one end side opening 51 communicated with the inside of the heat gas supply housing 2 and with the other end side opening 52 communicated with the inside of the heat gas recovery housing 6, and further disposed, inclined clockwise with respect to an axial center line P1 of the housing 3 viewing the other end side opening 52 from the one end side opening 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-containing coating material which is recovered by washing and treating the remaining mist-like coating material with water in a painting step of spraying a mist-like coating material on a member to be coated. The present invention relates to a paint drier drier that can be used when the dregs are dried.

[0002]

2. Description of the Related Art Conventionally, for example, in a coating process of spraying an atomized paint on an object to be coated arranged in a coating booth, the remaining atomized paint is washed off with water and treated. The water-containing paint lees recovered in the treatment process are dried and then used for recycling or burning.

Here, a drying device or a dryer is used to dry the water-containing paint lees. For example, (1) Japanese Patent Laid-Open No. 2000-55559 discloses a structure in which a heating means and an agitating means are separately provided in a storage chamber in order to dry a paint waste put in (supplied) to the storage chamber. Has been done. (2) Japanese Patent Laid-Open Publication No. 8-500522 discloses a structure in which a heating means and a stirring means are separately provided in the drum in order to dry the paint sludge charged (supplied) into the rotatable drum. It is disclosed. (3) In addition, as a conventional general dryer, a jacket heat exchanger (heating means mainly using steam as a heat source and equipped with a large number of thin tubes in order to dry the water-containing paint lees put into the drying chamber is used. ) And a feeding mechanism (stirring means) equipped with screw type blades are separately provided.

[0004]

(1) The aforementioned Japanese Patent Laid-Open No. 200
In the case of the drying device disclosed in Japanese Patent Publication No. 0-55559 and Japanese Patent Publication No. 8-500522, or the above-mentioned conventional general dryer, when the water-containing paint lees to be dried are heated and stirred, the drying is performed. Since the heating means and the stirring means provided separately in the room are used, the structure is complicated and the manufacturing cost is disadvantageous by this amount (note that the one equipped with the jacket heat exchanger is manufactured. The cost is likely to be high), and so on. (2) Further, the adjustment of the drying performance in the dryer or the dryer is performed by so-called supply such as the temperature on the heating gas introduction side of the heating means, the introduced amount of the heated gas, the discharged amount of the heated gas after heat exchange, and the like. Since it is general to collectively control the system or the exhaust system, the adjustment and control depending on the situation inside the gas pipe is likely to be rough, and the fine adjustment and control are difficult.

The present invention has been made in view of the above-mentioned problems, and has a heat exchange function of applying heat required for a drying process to a water-containing paint lees which is a drying object and is put into a drying chamber.
A plurality of heat exchanging passage portions configured to perform two or more functions such as a stirring and conveying function of conveying and moving from one end side to the other end side in the axial direction of the drying housing while stirring is provided, and a predetermined heat exchange passage portion is provided. It is an object of the present invention to provide a paint lees dryer that can be dried up to the amount of water, can reduce the manufacturing cost compared with the conventional drying device (machine), and can easily adjust and control the flow rate of heating gas. To do.

[0006]

A paint drier dryer of the present invention is provided with a hot gas supply housing for sending hot gas heated to a predetermined temperature to a heat exchange region, and a predetermined housing for the hot gas supply housing. And a hot gas recovery housing that recovers the hot gas after heat exchange in the heat exchange region, and is rotationally driven between the hot gas supply housing and the hot gas recovery housing. It is arranged rotatably by the part,
The peripheral wall portion is provided with openable and closable openings, respectively, into which the undried paint meal to be dried is put, and an outlet for discharging the dried paint meal, and one end and the other end in the axial direction of the peripheral wall portion are closed. And a rotary housing that is a tubular hollow body, and are arranged at predetermined intervals along the circumferential direction on the inner surface of the peripheral wall portion of the rotary housing, and one end side openings communicate with the hot gas supply housing, respectively. A plurality of the plurality of openings, which are communicated with each other in the hot gas recovery housing and are inclined in the clockwise direction with respect to the axis of the rotary housing when the other end opening is seen from the one end opening. And a heat exchange passage part.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION According to the paint drier dryer of the present invention,
The hot gas that has been heated to a predetermined temperature in advance is supplied from the supply source into the hot gas supply housing, and is further arranged in the heat exchange region within the rotary housing from within the hot gas supply housing. After being sent to the heat exchange passage, it is recovered in the hot gas recovery housing, returned to the supply source, heated again to a predetermined temperature, and then sent to the hot gas supply housing for circulation. After being collected in the hot gas recovery housing, it is released into the atmosphere.

Here, in the rotary housing, a water-containing paint lees [(water content of about 5
0% (weight%, the same applies hereinafter) to about 70%] is charged in a predetermined amount.

After that, the rotary housing is rotated by the rotary drive unit. In this case, the rotary housing is rotated clockwise with respect to the axial center line of the rotary housing when the hot gas recovery housing side is viewed from the hot gas supply housing side.

Then, the paint dregs in the rotary housing are guided in the clockwise direction in a distributed state for each of a number of transport paths formed by two heat exchange passage portions which are adjacent to each other in substantially parallel to each other. It moves and is conveyed to the hot gas recovery housing side. The paint dregs being conveyed to the hot gas recovery housing side come into contact with a plurality of heat exchanging passages whose positions change 360 ° with rotation simultaneously and successively.

As described above, since a plurality of heat exchanging passages are used, heat exchange due to contact with the water-containing paint lees to be dried can be efficiently performed, and the desired water content of about 2 can be achieved in a short time.
It can be dried to 0%. The arrival of the water content range can be detected by a sensor (water content detection sensor) installed in the rotary housing. Then, the dried paint residue is discharged to the outside through an openable / closable outlet.

Therefore, since the paint lees dryer of the present invention has a plurality of heat exchanging passages arranged in the rotating housing in a slanting manner as described above, it is put into the drying chamber. The water-containing paint lees to be dried can be dried while stirring with the rotation of the rotating housing, and the heat exchange function contributes to the drying by exchanging heat with the paint lees to be dried and the axial direction of the rotating housing. It is possible to obtain two or more functions such as a stirring and conveying function of conveying and moving from one end side to the other end side.

Therefore, the structure is simple and the manufacturing cost is advantageous as compared with the conventional drying device or dryer using the heating means and the stirring means separately provided in the drying chamber.

The inclination angles of the plurality of heat exchange passages are as follows:
The rotation housing may have a configuration in a range of 10 ° to 30 ° with respect to the axis of the rotation housing.

In this case, the coating material residue to be dried existing in the groove-shaped concave portion formed by the interval width between the plurality of heat exchange passage portions is transferred from the one end side of the rotary housing to the other as the rotary housing rotates. It is possible to stir in the rotation direction while moving toward the end side. For this reason, the coating material for drying can increase the efficiency of heat exchange by coming into contact with the plurality of heat exchange passage portions.

The plurality of heat exchange passages may be arranged in parallel with each other and extend linearly or spirally. In this case, when the rotary housing is rotated clockwise when looking from the one end side (hot gas supply housing side) to the other end side (hot gas recovery housing side),
While the opening on the one end side of the heat exchange passage communicating with the hot gas supply housing extends from the rotation top dead center region to the rotation bottom dead center region, the coating cake in the rotary housing is slanted to the heat gas recovery housing side. It is possible to form a plurality of linear conveying passages or spiral conveying passages to be obtained.

The cross-sectional shape of the plurality of passage portions may be circular, semicircular, substantially triangular or substantially quadrangular. In this case, when the cross-sectional shape is circular, for example, a plurality of heat exchange passages can be formed by welding a plurality of cylindrical metal pipes to the inner peripheral surface of the rotary housing. Also, a plurality of substantially triangular angle members and a plurality of C
A plurality of heat exchange passages are formed by welding an opening (a groove-shaped opening extending in the longitudinal direction) of the steel material to the inner peripheral surface of the rotary housing while facing the inner peripheral surface of the rotary housing.
It can be provided.

When the cylindrical metal pipe is arranged on the inner peripheral surface of the rotary housing, it is in a linearly or spirally extended state. In the spirally extended state, a part of the cylindrical metal pipe in the circumferential direction is in contact with the entire inner circumferential surface of the rotary housing.

In the linearly extended state, one end side and the other end side in the longitudinal direction of the cylindrical metal pipe are in contact with the inner peripheral surface of the rotary housing, but the one end side and the other end side are contacted with each other. The intermediate region between does not contact the inner peripheral surface of the rotary housing.

The metal pipe can be fixedly held by welding or a fixing member or other fixing means in a state where at least a part of the metal pipe is in contact with the inner peripheral surface of the rotary housing.

The plurality of heat exchanging passages may be connected to each other by a heat radiating plate. In this case, since the heat radiation plate is provided, the amount of heat radiation increases, and at the time of exchanging heat with the drying-target coating meal in the rotary housing, it is possible to increase the heat contributing to the drying of the drying-target coating meal. Further, in the plurality of heat exchange passage portions connected by the heat dissipation plate, the depth of the groove formed by each interval becomes shallow, and, for example, a part of the dried paint residue is less likely to adhere to the bottom of the groove. In addition, it is possible to expect an effect that the dried paint lees can be easily conveyed and moved in the axial direction in the rotary housing.

The hot gas recovery housing is removably mounted at a position facing the rotary housing, and has a communication hole communicating with at least one of the other end openings of the plurality of heat exchange passage portions. A control plate for controlling the flow rate of the hot gas flowing through the plurality of heat exchange passages by setting the number of the hot gas recovery housings that communicate with each other through the communication hole of the other end side opening. Any configuration can be used.

In the control plate, the number of communication holes,
It is possible to prepare a plurality of communicating holes having various shapes and sizes and replace them according to the purpose. At least one communication hole is formed in the control plate, and in addition, a plurality of circular holes or arc-shaped long holes arranged at predetermined intervals along the circumferential direction can be used. .

Examples of the hot gas include exhaust gas after being used for various heating, combustion gas generated by burning dust and other wastes, and heated air. , A high temperature gas in the range of 150 ° C to 200 ° C can be used. By reusing the combustion gas that has been released into the atmosphere as it is, it is possible to reduce the cost of the drying process.

[0025]

[Embodiment] FIG. 1 shows Embodiment 1 of a paint lees dryer of the present invention.
FIG. 8 and Example 2 are shown in FIGS. 9 and 10, Example 3 is shown in FIG. 11 and Example 4 is shown in FIG.

(Embodiment 1) A paint drier dryer 1A according to Embodiment 1 shown in FIG. 1 is opposed to a hot gas supply housing 2 and a predetermined space L (see FIG. 2) facing the hot gas supply housing 2. Housing 6 for collecting hot gas, a rotary housing 3 rotatably arranged between the housing 2 for supplying hot gas and the housing 6 for collecting hot gas, and a drive for rotationally driving the rotary housing 3. Part 4 and a straight line P2 parallel to the axis P1 of the rotary housing 3 (see FIG. 2)
With a plurality of heat exchanging passages 5 arranged in a lower right direction.

The hot gas supply housing 2 and the hot gas recovery housing 6 are fixedly held by a base (not shown) by a holding member (not shown), respectively.
The interval L can be set freely.

The hot gas supply housing 2 accommodates the peripheral wall portion 20 having a bottomed cylindrical shape, an inlet passage 21 formed in the peripheral wall portion 20 and communicating with a supply source of the thermal gas, and the hot gas introduced from the inlet passage 21. And an opening 23 that opens in the axial direction P toward the hot gas recovery housing 6.

In the opening 23, as shown in FIG.
A fitting seal portion 24 having a concave cross section is formed on the inner peripheral side of the peripheral wall portion 20 in the circumferential direction S (see FIG. 3). A ring-shaped engaging portion 33 having a convex cross-section formed on the outer periphery of one end side of the rotary housing 3 described later is fitted into the fitting seal portion 24 so as to be rotatable and slidable about the axis P1. In addition,
The bottomed cylindrical peripheral wall portion 20 is configured such that the vertical wall portion 20a facing the opening portion 23 is integrally formed, or the vertical wall portion 20a can be detachably mounted in an airtight (sealed state). You can

The rotary housing 3 is disposed between the hot gas supply housing 2 and the hot gas recovery housing 6 so as to be rotatable by the rotary drive unit 4, and has a cylindrical peripheral wall portion 30 and a cylindrical peripheral wall. One end side vertical wall portion 30a (see FIG. 2) and the other end side vertical wall portion 30b (see FIG. 2) in the axial direction P of the portion 30.
(See reference) is a closed cylindrical hollow body. Cylindrical peripheral wall 3
As shown in FIG. 2, a charging port 3 for charging the undried paint residue to be dried is provided near the one end side vertical wall portion 30a.
1 and a lid 31a for opening and closing the inlet 31 are provided, and a take-out port 32 for ejecting the dried paint residue and a lid 32 for opening and closing the take-out port 32 are provided near the other end side vertical wall portion 30b.
a is provided.

Further, the cylindrical peripheral wall portion 30 is provided with a ring-shaped engaging portion 33 having a convex cross-section formed on the outer circumference on one end side and a ring-shaped engaging portion 34 having a convex cross-section formed on the outer circumference on the other end side. .

The ring-shaped engaging portion 33 is fitted in the fitting seal portion 24 of the hot gas supply housing 2 so as to be rotatable and slidable. The ring-shaped engaging portion 34 is used for the hot gas recovery housing 6
It is fitted in the fitting seal portion 64 of FIG.

The rotation drive unit 4 is a motor 40 fixedly held by a base (not shown) by a holding member (not shown).
A drive gear 41 that is interlocked with the drive of the motor 40, and a ring-shaped attachment to the outer surface 300 of the cylindrical peripheral wall portion 30 of the rotary housing 3 that meshes with the drive gear 41 and that rotates with respect to the rotational drive of the drive gear 41. 3 and a driven gear 42 that is driven to rotate. The driven gear 42
And to make the driven rotation of the rotary housing 3 smooth,
The driven guide rollers 43, 44 that slide on the outer surface 300 of the cylindrical peripheral wall portion 30 at one end side and the other end side of the cylindrical peripheral wall portion 30.
Is installed. The motor 40 can be controlled by, for example, an inverter (not shown) so as to obtain an optimum rotation speed.

A cylindrical metal pipe is used for the plurality of heat exchanging passages 5, and the peripheral wall portion 50 extends in the circumferential direction S on the inner surface 301 of the cylindrical peripheral wall portion 30 of the rotary housing 3 (see FIG. 3).
Are arranged at predetermined intervals along and fixed by welding,
Retained. As shown in FIG. 2, one end side opening 51 of each heat exchange passage 5 communicates with the accommodation chamber 22 of the hot gas supply housing 2, and the other end side opening 52 thereof includes the hot gas recovery housing 6. To the inside of the accommodation chamber 62. Each heat exchanging passage portion 5 is inclined from the one end side opening 51 toward the lower right with respect to the other end side opening 52 with respect to a straight line P2 parallel to the axis P1 at an inclination angle θ of 10 ° to 30 ° (see FIG. 2). ) Is set.

Each heat exchanging passage portion 5 has one end side vertical wall portion 30a to the other end side vertical wall portion 30 of the rotary housing 3.
Looking at b, it is slightly spirally inclined in the clockwise direction S1 (see FIG. 3). In this case, the one end side opening 51 and the other end side opening 52
The angle forming the phase difference in the circumferential direction S with respect to is set to 10 ° to 30 °.

The hot gas recovery housing 6 has a bottomed cylindrical peripheral wall portion 60, an outlet passage 61 formed in the peripheral wall portion 60 and communicating with a hot gas recovery portion, and a heat gas supply housing 2 for heat exchange. An accommodation chamber 62 for accommodating the hot gas after heat exchange introduced through the passage portion 5 and an opening portion 63 opening in the axial direction P toward the hot gas supply housing 2 are provided.

In the opening 63, as shown in FIG.
On the inner peripheral side of the peripheral wall portion 60, a fitting seal portion 64 having a concave cross section is formed to make one round in the circumferential direction S. This fitting seal part 6
A ring-shaped engaging portion 34 having a convex cross-section formed on the outer periphery of the rotary housing 3 on the other end side is rotatably fitted around the shaft center line P1. In addition, the bottomed cylindrical peripheral wall portion 60
Can be configured such that the vertical wall portion 60a facing the opening portion 63 is integrally formed, or the vertical wall portion 60a can be detachably mounted in an airtight (sealed state).

As described above, according to the coating material drier 1 of Example 1 configured as described above, hot gas (150 ° C. to 200 ° C.) is used.
Waste gas) is supplied from the supply source to the inlet passage 21 of the hot gas supply housing 2.

Next, the hot gas introduced from the inlet passage 21 into the accommodation chamber 22 is further introduced from the accommodation chamber 22 into the one end side opening 51 of each heat exchange passage portion 5, and then the hot gas is recovered from the other end side opening 52. It is introduced into the accommodation chamber 62 of the housing 6 and discharged from the outlet passage 61 to the outside.

Here, in the drying chamber 3a of the rotary housing 3, the water content is about 50% to 70% from the opening / closing inlet 31.
A predetermined amount of the coating meal for drying is added.

Thereafter, the rotary housing 3 is rotated by the rotary drive unit 4 at 3 rpm to 10 rpm. In this case, the rotary housing 3 is the hot gas supply housing 2
When viewed from the side, the hot gas recovery housing 6 side is rotated clockwise with respect to the axis P1 of the rotary housing 3.

Each heat exchange passage 5 is heated by the hot gas flowing from the one end side opening 51 to the other end side opening 52.

Then, the coating material for drying is stirred and transported in the axial direction P and the circumferential direction S at the intervals between the heat exchange passage portions 5 and is brought into contact with the heat exchange passage portions 5 for heat exchange.
It is heated to 100 ° C to 120 ° C. Then, when the water content is dried to about 20%, the heating limit is found (detected) by a sensor (not shown), the rotation drive unit 4 is stopped and controlled, and the rotation housing 3 is stopped rotating (the drying chamber is not shown). It is desirable that the upper limit temperature of the paint meal heated and dried in 3a does not exceed 120 ° C. The reason for this is that when 120 ° C. is exceeded, the particles forming the paint deteriorate. This is because it may not be suitable for recycling).

The coating meal after drying in the drying chamber 3a is covered with a lid 32.
It is taken out from the outlet 32 by opening a. Since the paint meal after drying contains a suitable amount of water, it is recycled (for example, a part of the material forming the undercoat paint, or a part of the material mixed with vinyl chloride products).
It will be easy to handle for use.

Thus, according to the paint lees dryer 1A,
Hot gas supply housing 2 and hot gas recovery housing 6
In the drying chamber 3a of the rotary housing 3 which is rotatably arranged by the drive unit 4 between the and, a tilt angle θ of 10 ° to 30 ° toward the lower right with reference to a straight line P2 parallel to the axis P1. (Refer to FIG. 2) It is a simple structure having a plurality of heat exchange passage portions 5 which are set to 150 ° C. to 200 ° C. and which flow hot gas.

Then, the coating material cake to be dried having a water content of about 50% to 70%, which has been put into the drying chamber 3a of the rotary housing 3, is
As the rotary housing 3 rotates, heat is efficiently exchanged while being agitated and conveyed along the heat exchange passage 5 in the axial direction P and the circumferential direction S while being in contact with the plurality of heat exchange passages 5. And can be dried to a water content of about 20%. Therefore, according to the coating material drier 1A of the first embodiment, the plurality of heat exchanging passage portions 5 can dry the coating material to be dried while agitating it with the rotation of the rotary housing 3, and dry it. It is possible to obtain two or more functions such as a heat exchange function of exchanging heat with the target paint lees and contributing to drying, and a stirring and conveying function of conveying and moving from one end side to the other end side in the axial direction P of the rotary housing 3.

Therefore, the structure is simple and the manufacturing cost is advantageous as compared with the conventional drying device or dryer using the heating means and the stirring means separately provided in the drying chamber.

(Modifications 1 to 3) In the first embodiment, the heat exchanging passage 5 is a cylindrical metal tube. However, the present invention is not limited to this.
As a first modification thereof, a heat exchange passage 5a having a semicircular cross section shown in FIG. 4, as a second modification, a heat exchange passage 5b having a substantially triangular cross section shown in FIG. 5, and as a third modification, a substantially square cross section shown in FIG. Can be used as the heat exchange passage portion 5c.

Further, in the case of each of the modified examples shown in FIGS. 4 to 6, the heat exchange passage portions 5a, 5b, 5c respectively have the entire rotation region 3 in the longitudinal direction (axial direction P).
The cylindrical peripheral wall portion 30 is integrated by welding and a part of the cylindrical peripheral wall portion 30 is shared. In this case as well, it is possible to obtain substantially the same effect as that of the first embodiment.

(Modification 4) Furthermore, Modification 4 shown in FIG.
In this case, the configuration is the same as that of the first embodiment except that the plurality of heat exchange passages 5 are connected by the metal heat dissipation plate 5d.

In this case, since the heat radiating plate 5d is provided, the heat radiating effect from the heat exchanging passage portion 5 is high and the heat radiating amount is increased. Therefore, the coating material to be dried put into the drying chamber 3a of the rotary housing 3 is provided. When exchanging heat with the lees, it is possible to increase the heat that contributes to the drying of the lees to be dried.

Further, in the plurality of heat exchange passage portions 5 connected by the heat radiating plate 5d, the depth h1 of the groove formed by each interval becomes shallow, and, for example, as shown in FIG. A part R of the groove does not adhere to the gap between the bottom of the groove (the inner surface 301 of the cylindrical peripheral wall portion 30) and the heat exchange passage 5, and the adherence solidifies as it is and there is no possibility of lowering the heat exchange efficiency. That is, it is possible to obtain the effect of easily stirring and transporting the dried coating meal and the dried coating meal in the axial direction P and the circumferential direction S.

(Embodiment 2) A coating material drier 1B of Embodiment 2 shown in FIG. 9 faces a housing 6B for recovering hot gas to one of the openings 52 on the other end side of a plurality of passages 5 for heat exchange. It has the same structure as the paint drier dryer 1A of the first embodiment except that the control plate 7 having the communication hole 70 is provided. Therefore, the description of the same components as in the paint lees dryer 1A of the first embodiment is based on the drawings of the first embodiment, and the description thereof is omitted (also
In the figure, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted).

The control plate 7 has a communicating hole 70 facing one of the openings 52 on the other end side of the plurality of heat exchanging passage portions 5, and a mounting hole 71 circumferentially arranged on the peripheral edge portion (see FIG. 10).
With.

In the control plate 7, the mounting bolts 74 inserted through the mounting holes 71 are attached to the hot gas recovery housing 6 by
By being screwed into a screw hole 631 formed in a peripheral edge portion 630 forming the opening portion 63 of B, it is detachably fixedly held in the accommodation chamber 62 at a position facing the opening portion 63.

This control plate 7 has one surface 73,
Vertical wall portion 30 on the other end side of the rotary housing 3 during rotation
b is in sliding contact with the other end side opening 52 of the plurality of heat exchanging passage portions 5 opening to the other end side vertical wall portion 30b.
It has the function of controlling the flow rate of the hot gas flowing from the accommodation chamber 22 of the hot gas supply housing 2 through the heat exchange passage portion 5 to the accommodation chamber 62 of the hot gas recovery housing 6B by closing in a region other than the position. .

According to the paint drier dryer 1B of the second embodiment, the opening 52 of the other end of the rotating housing 3 and the plurality of rotating heat exchange passages 5 coincide with the communication holes 70 of the control plate 7 when used. Hot gas is discharged from the accommodation chamber 22 of the hot gas supply housing 2 to the accommodation chamber 62 of the hot gas recovery housing 6B via the heat exchange passage portion 5 and the communication hole 70 every time when reaching the position. .

In this way, the hot gas recovery housing 6B is used.
Although one of the plurality of heat exchange passage portions 5 can be communicated with the accommodation chamber 62 of the above through the communication hole 70 of the control plate 7, the other end side opening of the other heat exchange passage portions 5 is provided. Since 52 is opposed to the one surface 73 of the control plate 7, it does not communicate, and the flow rate of the hot gas from the accommodation chamber 22 of the hot gas supply housing 2 to the accommodation chamber 62 of the hot gas recovery housing 6B can be regulated. .

Therefore, the drying chamber 3a of the rotary housing 3
It is possible to control the amount of heat applied to the coating cake to be dried to a target value in accordance with the amount of the coating cake to be dried and the water content (about 50% to about 70%) of the coating cake to be dried. In addition, it can be efficiently dried to a water content of about 20%.

The communication hole 70 formed in the control plate 7 is not limited to one as described above, and may be, for example, a circular arc shape extending in the circumferential direction according to the purpose, as a modified example not shown. It is possible to use a long hole or a plurality of circular holes arranged in the circumferential direction. In this case,
The flow rate of hot gas from the accommodation chamber 22 of the hot gas supply housing 2 to the accommodation chamber 62 of the hot gas recovery housing 6B can be increased more than in the case where the one communication hole 70 is provided, and The amount of heat applied to the coating meal for drying can be increased by the increase in the flow rate of hot gas.

(Embodiment 3) A coating material drier dryer 1C of a third embodiment shown in FIG. 11 has a cylindrical peripheral wall portion 30 of the rotary housing 3 of the coating material drier 1A of the first embodiment and the other end side vertical wall portion 30b. Instead of the take-out port 32 for discharging the dried paint meal and the lid 32a for opening and closing the take-out port 32, the dried paint meal is naturally dropped to the outside by its own weight when the drying chamber 3a is rotated. Except for using the rotary housing 3C and the hot gas recovery housing 6C configured as described above, it has the same configuration as the paint drier dryer 1A of the first embodiment. Therefore, the description of the same components as those of the paint lees dryer 1A of the first embodiment is based on the drawings of the first embodiment, and the description is omitted (the same components in the drawings are the same as those of the first embodiment). The reference numerals are attached and the description thereof is omitted).

On the cylindrical peripheral wall portion 30 of the rotary housing 3C, the other end side vertical wall portion 30 is provided at a predetermined interval in the circumferential direction between adjacent ones of the plurality of heat exchange passage portions 5.
A hole-shaped outlet 32c is provided near b.

The hot gas recovery housing 6C is provided with a hopper 65 having an opening 650 at the bottom of the peripheral wall 60.

The cylindrical peripheral wall portion 30 of the rotary housing 3C is rotatably fitted into the peripheral wall portion 60, and the outer peripheral surface 300 of the cylindrical peripheral wall portion 30 is slidably in contact with the inner peripheral surface of the peripheral wall portion 60. It can move in the circumferential direction S and has a cylindrical peripheral wall portion 3
Each of the 0 take-out ports 32c is mounted so as to completely communicate with the opening 650 of the hopper 65 when the take-out port 32c is rotationally moved to the bottom dead center region of the circumferential direction S.

According to the paint lees dryer 1C of the third embodiment, the paint lees to be dried are set in the same manner as in the first embodiment with the intervals between the heat exchange passage portions 5 in the axial direction P and the circumferential direction S. While being stirred and transported, heat is exchanged by coming into contact with each heat exchange passage 5 and heated up to 100 ° C to 120 ° C. Then, it is dried to a water content of about 20% and dried in a drying chamber 3a.
When agitated and conveyed near the other end side vertical wall portion 30b, each take-out port 32c of the cylindrical peripheral wall portion 30 rotationally moves to the bottom dead center region of the circumferential direction S, and the opening 65 of the hopper 65 is opened.
Every time when it reaches the point where it is completely communicated with 0, the dried paint residue is discharged from its outlet 32c through the hopper 6 by its own weight.
5 spontaneously falls to the outside through the opening 650.

According to the paint drier dryer 1C of the third embodiment, in addition to the effects of the paint drier dryer 1A of the first embodiment, the rotation of the rotary housing 3C can be prevented from being stopped, and Each time, as in the case, the lid 3 of the outlet 32
It is possible to omit the work step of opening the 2a and taking out the dried paint lees from the drying chamber 3a to the outside, which is advantageous in terms of the work cost. Therefore, the description of the same components as those of the paint lees dryer 1A of the first embodiment is based on the drawings of the first embodiment, and the description is omitted (the same components in the drawings are the same as those of the first embodiment). The reference numerals are attached and the description thereof is omitted).

(Embodiment 4) The paint lees dryer 1D of the fourth embodiment shown in FIG. 12 is different from that of the paint lees dryer 1B of the second embodiment except that the hot gas recovery housing 6D having the control plate 7 is used. Has the same configuration as the paint drier dryer 1C of the third embodiment. Therefore, the description of the same components as the paint drier dryer 1B of the second embodiment and the paint drier dryer 1C of the third embodiment is described in the second embodiment.
3 are referred to and the description thereof is omitted (the same components as those in the drawings are denoted by the same reference numerals as those in the second and third embodiments and the description thereof is omitted).

According to the paint lees dryer 1D of the fourth embodiment, the openings 52 on the other end of the plurality of rotating heat exchange passages 5 coincide with the communication holes 70 of the control plate 7 together with the rotary housing 3C when used. Each time you reach the position
The hot gas is discharged from the accommodation chamber 22 of the hot gas supply housing 2 to the accommodation chamber 62 of the hot gas recovery housing 6D via the heat exchange passage portion 5 and the communication hole 70.

In this way, the hot gas recovery housing 6D
Although one of the plurality of heat exchange passage portions 5 can be communicated with the accommodation chamber 62 of the above through the communication hole 70 of the control plate 7, the other end side opening of the other heat exchange passage portions 5 is provided. Since 52 is opposed to the one surface 73 of the control plate 7, it does not communicate, and the flow rate of the hot gas from the accommodation chamber 22 of the hot gas supply housing 2 to the accommodation chamber 62 of the hot gas recovery housing 6D can be regulated.

Further, as in the case of the paint drier dryer 1C of the third embodiment, the vertical wall portion 30 on the other end side of the drying chamber 3a is used.
The dried paint lees that have been agitated and transported near b,
Each time the outlets 32c of the cylindrical peripheral wall portion 30 are rotationally moved to the bottom dead center region of the circumferential direction S and reach the point where they are completely communicated with the opening 650 of the hopper 65, the dried paint residue is dried by its own weight. It spontaneously falls from the take-out port 32c to the outside through the opening 650 of the hopper 65.

Therefore, according to the coating material drier 1D of the fourth embodiment, the effects of the second embodiment and the third embodiment can be obtained.

[0072]

The paint lees dryer of the present invention has a structure in which a plurality of heat exchanging passages are arranged in the rotating housing in a slanted manner as described above. The water-containing paint lees to be dried can be dried while stirring with the rotation of the rotating housing, and the heat exchange function contributes to the drying by exchanging heat with the paint lees to be dried and the axial direction of the rotating housing. It is possible to obtain two or more functions such as a stirring and conveying function of conveying and moving from one end side to the other end side.

For this reason, the structure is simple and the manufacturing cost is advantageous as compared with the conventional drying device or dryer using the heating means and the stirring means separately provided in the drying chamber.

Further, since the heat exchanging passage is composed of a plurality of passages, all the other end side openings are opened in the hot gas recovering housing and one other end side opening is used as the hot gas recovering housing. The flow rate of the heating gas can be adjusted and controlled in a wide range up to the opened use state, and it is easy to adjust and control, depending on the purpose, for example, the water-containing paint lees (water content of about 50% to about 70%) to be dried. %) Can be dried to a water content range of about 20%, which is easy to handle during recycling.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a paint drier dryer of Example 1. FIG.

FIG. 2 is a schematic cross-sectional view showing a main part of the paint lees dryer according to the first embodiment taken along a line parallel to the axis P1 of the rotary housing.

FIG. 3 is a schematic cross-sectional view of a rotary housing and a plurality of heat exchange passages of the paint drier dryer of the first embodiment, taken in a direction orthogonal to the axis P1.

FIG. 4 is a schematic cross-sectional view showing a modified example 1 of a plurality of heat exchange passage portions at the same cross-sectional position as in FIG.

5 is a schematic cross-sectional view showing a modified example 2 of the plurality of heat exchange passage portions at the same cross-sectional position as in FIG.

6 is a schematic cross-sectional view showing a modified example 3 of a plurality of heat exchange passage portions at the same cross-sectional position as in FIG.

7 shows a modified example 4 of the plurality of heat exchange passage portions at the same cross-sectional position as in FIG. 3, in which the plurality of heat exchange passage portions having the rotary housing and the heat dissipation plate are arranged in a direction orthogonal to the axis P1. FIG.

FIG. 8 is a schematic cross-sectional view showing a possibility of a paint residue adhering state in the case where a heat dissipation plate is not provided in the plurality of heat exchange passage portions in FIG.

FIG. 9 is a schematic cross-sectional view showing a main part of the paint lees dryer according to the second embodiment, taken along a line parallel to the axis P1 of the rotary housing.

FIG. 10 is a schematic perspective view showing a hot gas recovery housing of the paint drier dryer of the second embodiment and a control plate that is detachably attached to the mounting position and controls the flow rate of the hot gas.

FIG. 11 is a schematic perspective view showing a paint drier dryer of Example 3.

FIG. 12 is a schematic cross-sectional view showing a main part of the paint lees dryer according to the fourth embodiment, the cross section being parallel to the axis P1 of the rotary housing.

[Explanation of symbols]

1A, 1B, 1C, 1D ... Paint drier dryer 2 ... Hot gas supply housing 3A, 3C ... Rotating housing member 3a ... Drying chamber
30 ... Cylindrical peripheral wall part 30a ... One end side vertical wall part 30b ... The other end side vertical wall part
31 ... Input ports 31a, 32a ... Lids 32, 32c ... Ejection ports
4 ... Rotational drive section 40 ... Motor 41 ... Drive gear 42 ... Driven gears 43, 44 ... Driven guide roller 5 ... Heat exchange passage section 50 ... Peripheral wall section 51 ... One end side opening 52 ... Other end side opening
5d ... Heat dissipation plate 6, 6B, 6C, 6D ... Heat gas recovery housing 7 ...
Control plate 70 ... Communication hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Chikayuki             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. F term (reference) 3L113 AA06 AB06 AC01 AC58 AC68                       BA01 CA02 CB40 DA25

Claims (6)

[Claims] 1. A heat gas supply housing for supplying a heat gas heated to a predetermined temperature to a heat exchange region, and a heat gas supply housing which is disposed to face the heat gas supply housing with a predetermined space therebetween. A hot gas recovery housing for recovering the hot gas after heat exchange in the area, and a rotatably arranged by a rotary drive unit between the hot gas supply housing and the hot gas recovery housing, each of which is opened and closed on the peripheral wall. A cylindrical hollow body having a charging port for charging an undried coating meal to be dried and an outlet for discharging the dried coating meal, and having one end and the other end in the axial direction of the peripheral wall portion closed. And a rotary housing, which is disposed on the inner surface of the peripheral wall portion of the rotary housing at a predetermined interval in the circumferential direction, and has one end side opening communicating with the hot gas supply housing and the other end side opening. The heat gas recovery housing Communicates with the inside grayed, a plurality of heat exchange passages disposed inclined in the clockwise direction with respect to axial line of the rotary housing watching other end side opening from said one end opening,
A paint drier dryer characterized by comprising: 2. The inclination angles of the plurality of heat exchange passages are:
The paint drier dryer according to claim 1, wherein the angle is in the range of 10 ° to 30 ° with respect to the axis of the rotary housing. 3. A paint drier dryer according to claim 2, wherein the plurality of heat exchange passages are arranged in parallel with each other and extend linearly or spirally. 4. The cross-sectional shape of the plurality of heat exchange passages is
A circular shape, a semicircular shape, a substantially triangular shape, a substantially quadrangular shape, or the like.
Paint lees dryer described. 5. The paint drier dryer according to claim 1, wherein the plurality of heat exchange passages are connected to each other by a heat dissipation plate. 6. The hot gas recovery housing is removably mounted at a position facing the rotary housing, and communicates with at least one of the other end side openings of the plurality of heat exchange passage portions. Control for controlling the flow rate of the hot gas flowing through the plurality of heat exchanging passages by setting the number of holes that are in communication with the hot gas recovery housing through the communication hole of the other end side opening. The paint drier dryer according to claim 1, claim 2 or claim 3 having a plate.