JPS60244330A - Granulation, drying and coating apparatus - Google Patents

Abstract

PURPOSE:To attain to increase a charging amount and to shorten a drying time by increasing an air passing amount, by providing a partition plate in the air passing duct covering the air passing part of a rotary container and dividing an air passing route into plural sections. CONSTITUTION:In a granulation, drying and coating apparatus, heated gas is blown into a rotary container 1 from an air supply conduit 3 through an air passing duct 4 and a perforated part 2 made of a metal net. Air passing ducts 14, 15 are divided into sections 14b-14d, 15b-15d by partition plates 16. These partitioned sections are separated into a part shortcircuiting with the heated gas and a part not shortcircuiting therewith by the relative positional relation of the outer end of an exhaust conduit 5 corresponding to the rotation of the container. Therefore, the heated gas is effectively utilized for the purpose of drying and efficient drying is performed.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a granulation/drying/coating apparatus, particularly a granulation/drying/coating apparatus having an aeration part for aeration drying on the peripheral wall of a drum-shaped rotating container as an aeration drying mechanism. Regarding.

[Background Art] Conventionally, when granulating, drying, and coating powder and granules are performed in a drum-shaped rotating container type granulation, drying, and coating device,
A method has been used in which hot air is blown onto the surface of the powder layer to dry the powder while the powder is rotated within the rotating container.

However, in this conventional method, only the powder on the surface of the powder layer to be transferred is relatively well dried, but the stagnation area in the center of the powder layer and the powder in the lower layer are dried. If the hot air reaches <<, drying will be insufficient. Therefore,
There is a drawback that it takes a long time to dry all the powder and granules, and the drying process is uneven.

In order to eliminate such drawbacks, a ventilation section for air drying is provided on the peripheral wall of the drum-shaped rotating container, and the ventilation section is covered with several ducts from the outer circumference of the container, and the outer end of the duct is connected to the rear surface of the container. A granulation/drying/coating device has also been put into practical use, in which granulation, drying, and coating are made to flow through a fixed ventilation pipe when the container is rotated to a specific position.

For example, in Japanese Patent Publication No. Sho 50-38713, the present applicant has proposed several or all locations around the body of a rotatable drum-shaped coaching pan (rotary container) 1, as shown in FIGS. The present invention proposes a pan coaching device equipped with an aeration drying mechanism including a perforated portion 2 for ventilation, an air supply conduit 3, a ventilation duct 4, and an exhaust conduit 5. In this pan coaching device, the air supply pipe 3 is connected to the coaching pan 1.
The heated gas blown into the coaching pan 1 is blown onto the granular material 6 transferred within the coaching pan 1, and after passing through the layer of the granular material 6, it is exhausted from the porous portion 2 through the ventilation duct 4 and the exhaust conduit 5. Ru. Reference numeral 7 denotes a rotating shaft for rotating the coaching pan 1, 8 a bearing for the rotating shaft 7, 9 a supporting roll for the coaching pan 1, and 10 connecting the rotating shaft 7 via a transmission means 11 such as a belt or chain. Reference numeral 12 indicates a pan opening that forms a material input port into the coaching pan 1, and 13 indicates a lid of the pan opening 12. does not rotate, and the connecting portion between this non-rotating portion and the rotating portion such as the coaching pan 1 is sealed with a labyrinth seal or the like.

This mechanism can also reverse supply and exhaust, and can be applied not only to coating operations but also to granulation and drying.

By the way, in such a granulation/drying/coating device, the connection surface between the ventilation duct and the exhaust pipe is shown in Fig. 3 Fa+,
(It looks like bl. In other words, (8) in Figure 3)
is the outer end 4a of the ventilation duct 4 (in the figure) is the cross section of the outer end 5a of the exhaust conduit 5. Ventilation begins when the outer end 4a of the ventilation duct 4 reaches the position shown in FIG. 4 (al), and ends at the position shown in FIG. 4 (fb). Therefore, in such a device,
In order to increase the amount of ventilation to increase the amount of preparation and shorten the drying time, methods such as increasing the capacity of the blower (not shown), increasing the ventilation area, and increasing the opening area of the outer end 5a of the exhaust pipe 5 are available. Conceivable.

However, if you simply increase the capacity of the blower and increase the air flow, the pressure loss in the ventilation system will increase significantly, so you will need to take this into consideration and increase the capacity of the blower by a large amount, which will significantly increase the cost. Up. Moreover, when the gas velocity passing through the powder layer increases, problems such as pulverization of the granules and damage to the coating surface occur. Furthermore, if the ventilation area is increased or the opening area of the outer end 5a of the exhaust pipe 5 is increased, the fifth
As shown in the figure, a part of the heated gas does not pass through the powder layer and is short-circuited, resulting in a decrease in thermal efficiency and a longer drying time. In order to prevent short circuits in the heating gas, it is possible to make each ventilation duct smaller and increase the number of ventilation ducts, but this would not only greatly increase costs, but also significantly increase the time it takes to disassemble and clean the ventilation ducts. This is the result.

[Object of the Invention] An object of the present invention is to provide a container rotating type granulation/drying/coating device that enables an increase in the amount of ventilation at a low cost in order to increase the amount of preparation and shorten the drying time. .

[Summary of the Invention] The granulation/drying/coating device of the present invention is provided with a partition plate inside the ventilation duct that divides the outer periphery of the rotating container ventilation portion and the ventilation path from the rotation container ventilation portion to the fixed ventilation pipe into a plurality of parts. It is characterized by:

[Example 1] Fig. 6 is a schematic side sectional view of an embodiment of the granulation/drying/coating apparatus according to the present invention, Fig. 7 (Fal, fb), and Fig. 8 (al, (bl) are the granulation/drying/coating apparatus according to the present invention, respectively. FIG. 3 is a schematic front sectional view and a partial sectional view in an example.

In this embodiment, parts corresponding to those in the conventional structure shown in FIGS. 1 and 2 are given the same reference numerals, and redundant explanation will be omitted.

In this embodiment, the air supply conduit 3 is disposed on the rear surface of the drum-shaped rotating container 1, and the heated gas is passed from the air supply conduit 3 to the ventilation duct 4.
The liquid is blown into the rotating container l through the wire mesh-type porous part 2.

In this embodiment, as shown in FIG.
, 14c, 14d and 15b, 15C.

It is divided into three parts 15d, of which 14b, 14c, 14d and 15b are in a ventilated state in the state shown in FIG.

At this time, the outer ends 14a and 15a of the ventilation duct 14.15
The relative positions of the outer end 5a of the exhaust conduit 5 and the outer end 5a of the exhaust conduit 5 are as shown in FIG.

When the rotating container 1 is in the rotating position shown in FIG.
If not, the heated gas would be short-circuited in a part of the ventilation duct 15, but since the ventilation duct 15 is divided by the partition plate 16 into parts 15c and 15d where the heating gas is short-circuited and a part 15b which is not short-circuited, Figure 7 (Due to the relative positional relationship between the outer end 5a of the exhaust conduit 5 and the outer end 15a of the ventilation duct 15 shown in BL, the ventilation duct 15b in which the heating gas is not short-circuited is in the ventilation state, and the ventilation duct 15c in which the heating gas is short-circuited) 15c ,1
5d is in a state where there is no ventilation.

On the other hand, when the rotary container 1 rotates and reaches the rotational position shown in FIG.
c becomes ventilated. Ventilation duct at this time 14.15
The relative positions of the outer ends 414a and 15a of the exhaust pipe 5 and the outer end 5a of the exhaust pipe 5 are as shown in FIG. The heating gas is short-circuited in both ventilation ducts 14 and 15, but
The ventilation duct 14.15 is separated by the partition plate 16 from the parts 14b and 15d where the heating gas is short-circuited and the part 14C11 which is not short-circuited.
Since it is divided into 4d, 15b, and 15C, the 8th
The outer end 5a of the exhaust conduit 5 and the ventilation duct 15 shown in Figure (b)
Outside 61i! Due to the relative positional relationship of 15a, the heating gas is not short-circuited in ventilation ducts 1'4c, 14d and 15.
b, 15C are in a ventilation state, and ventilation ducts (14b, 15d) where the heating gas is short-circuited are in a non-ventilation state.

In this way, the porous part 2 of the rotary container 1 and the ventilation duct 14.1
5 thicker (even if the outer end 14a of the ventilation duct 14.15
, 15a and the outer end 5a of the exhaust conduit 5, the ventilation ducts 14, . By partitioning the inside of 15, short circuits of the heated gas can be prevented.

Therefore, in this embodiment, the heated gas is effectively used for drying, which is the original purpose, and there is no waste of the heated gas, so extremely efficient drying can be achieved.

[Example 2] FIG. 9 is a schematic side sectional view of another embodiment of the granulation/drying/coating apparatus according to the present invention, and FIG. 10(a).

(bl, 11th [1(al, bl is a schematic front cross-sectional view and a partial cross-sectional view, respectively, in this example.

In this embodiment, the heated gas is supplied from the air supply pipe 3 to the ventilation duct 4,
The liquid is blown through the porous portion 2 into the rotating container 1 in the shape of an approximately hexagonal polygonal drum. The porous portion 2 is provided almost all around the rotating container 1. After passing through the layer of powder and granular material 6, the blown heated gas passes through the inside of the hollow rotating shaft 7 and the exhaust pipe 5.
It is then exhausted.

In FIG. 10 (al), ventilation ducts 17, 18, 19 are separated by partition plates 16, 17b, 17c' and 18b, respectively.
It is divided into two parts, 18c, 19b, and 19c, of which 17b, 17c, 18b, and 18c.

19b is in the vented state. Ventilation duct 17 at this time.
18.19 outer ends 17a, 18a, 19a and air supply conduit 3
The relative positions of the outer ends 3a of the partition plates 16 and 16 are as shown in FIG.
If not, the heating gas would be short-circuited in a part of the ventilation duct 19, but since the ventilation duct 19 is divided by the partition plate 16 into a part 19c where the heating gas is short-circuited and a part 19b where the heating gas is not short-circuited, as shown in FIG. The outer end 3 of the air supply conduit 3 shown in bl
Due to the relative positional relationship between a and the outer end 19a of the ventilation duct 19, the ventilation duct 19b where heating gas is not short-circuited is in a ventilation state, and the ventilation duct 19c where heating gas is short-circuited is in a non-ventilation state.

The rotating container l rotates and comes to the rotating position of FIG. 11 (rut, ventilation duct) 17c, 18b, 18c, 19b, 19
c becomes ventilated. Ventilation duct 17.18 at this time
．． 19 outer ends 17a, 18a.

The relative positions of 19a and the outside m3a of the air supply pipe 3 are shown in Figure 11 (
It is as shown in bl. The rotational position of the rotating container 1 is the 11th rotation position.
In the state shown in the figure, if there is no partition plate 16, the ventilation duct 1
7, the heating gas is short-circuited, but the ventilation duct 17 is divided by the partition plate 16 into a portion 17b where the heating gas is short-circuited and a portion 17C where the heating gas is not short-circuited, so that the air supply conduit shown in FIG. Due to the relative positional relationship between the outer end 3a of 3 and the outer end 17a of the ventilation duct 17, the ventilation duct 17c where heating gas is not short-circuited is in a ventilation state, and the ventilation duct 17b where heating gas is short-circuited is in a non-ventilation state.

In this way, even if the porous portion of the rotating container 1 is made almost all around,
Outer ends 17a, 18a, 1 of ventilation ducts 17.18.19
9a and the outer end 3a of the air supply pipe 3,
By partitioning the inside of the ventilation duct 17, 18, 19 with the partition plate 16, short circuits of the heated gas can be prevented.

Note that the present invention is not limited to the above embodiments,
Various other variations are possible. Further, the present invention can be applied not only to conical type or octagonal column type granulation/drying/coating apparatuses, but also to cylindrical, polygonal column type, onion type, etc. granulation/drying/coating apparatuses.

[Effect] According to the present invention, by partitioning the inside of the ventilation duct into a plurality of parts, the relative positional relationship between the outer end of the ventilation duct and the outer end of a fixed ventilation pipe such as an air supply pipe or an exhaust pipe is used to improve ventilation. It is possible to obtain granulation, drying, and coating that can constantly increase the amount, increase the amount of preparation, and shorten the drying time. Further, the granulation/drying/coating apparatus of the present invention can be manufactured at low cost.

[Brief explanation of drawings]

Figure 1 is a partially cutaway side sectional view of a conventional granulation/drying/coating device, Figure 2 is a schematic front sectional view, and Figure 3 f.
at is a schematic front sectional view of the outer end of the ventilation duct, Figure 3 tbl
are schematic front sectional views of the outer end of the exhaust pipe, Figures 4+a) and (
bl is a diagram of the relative positional relationship between the outer end of the ventilation duct and the outer end of the exhaust pipe, FIG. 5 is a schematic front sectional view showing a short circuit of heated gas in the ventilation duct, and FIG. 6 is a diagram showing the granulation and
A schematic side sectional view of an embodiment of the drying/coating apparatus, FIGS. An explanatory diagram showing the relative positional relationship between the exhaust pipe and the outer end of the exhaust pipe, FIG.
al and FIGS. 8 to 8) are a schematic front sectional view of one embodiment in FIG. 6 and a relative positional relationship diagram of the outer end of the ventilation duct and the outer end of the exhaust conduit, respectively, and FIG. 9 is a diagram showing the granulation and Schematic side sectional views of other embodiments of the drying and coating device, FIGS. Relative positional relationship diagram with the outer end of Fig. 11 18+ and Fig. 11 fb
1 is a schematic front sectional view of the embodiment in FIG. 9 and a relative positional relationship diagram of the outer end of the ventilation duct and the outer end of the air supply conduit. 1...Drum-shaped rotating container, 2...Porous part (ventilation part)
, 3... air supply conduit, 3a... outer end of the air supply conduit, 4.
14.14b, 14c, 14d. 15.15b, 15c, 15d, 17.17b. 17c, 18.18b, 18c, 19.19b. 19c, -- ventilation duct, 4a, 14a, 15a. 17a, 18a, 19a... Outer end of ventilation duct, 5.
... Exhaust pipe, 5a... Outer end of exhaust pipe, 6... Powder, 7... Rotating shaft, 8... Bearing, 9... Support roll, 10... Motor, 11 ...Transmission means, 12
... Bread opening, 13... Lid, 16... Partition plate. Patent applicant Freund Sangyo Co., Ltd. Agent Patent attorney Dai Tsutsui Kazushi 11shio

Claims (1)

[Claims] A ventilation portion is formed at at least one (11 or more) locations on the peripheral wall of the horizontal rotating container, and the ventilation portion is covered with a ventilation duct from the outer peripheral surface of the rotating container, and one end of the ventilation duct is connected to the rotating container when the rotating container is rotated to a predetermined position. In the granulation/drying/coating device, which communicates with a fixed ventilation section on an end surface of the rotary container when the rotary container comes into contact with the fixed ventilation section, the ventilation path from the ventilation section of the rotary container to the fixed ventilation section is divided into a plurality of sections. A granulation/drying/coating device characterized in that a partition plate is provided inside the ventilation duct.