JP2003276843A - Carrier device and method for solid substance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carrier device for a solid substance forming a carrier route inside into a closed state and preventing the pressure from increasing more than necessary when the solid substance is carried with a liquid phase in the carrier route with two sub-carrier routes. <P>SOLUTION: This carrier device is provided with the carrier route 50 capable of carrying the solid substance with the flow of the liquid phase, a pump 64, and a solid substance feed means such as a pushing machine 32, the carrier route 50 is branched into two or more sub-carrier routes 58 and 60, and the branch part is provided with a branch valve 62. This carrier device is characterized in that, when the branch valve 62 is positioned in a first position, the flow 1 of the liquid phase flows in one sub-carrier route, and when a changeover means is positioned in a second position, the flow of the liquid phase flows in the other sub-carrier route, and when the changeover means is positioned in an intermediate part between the first position and the second position, the flow of the liquid phase flows in both of one sub-carrier route and the other carrier route. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid material carrying device and a carrying method, and more particularly to a solid material carrying device and a carrying method suitable for taking out solid materials such as pellets from cooling water.

[0002]

2. Description of the Related Art Conventionally, there are cases where it is desired to store a solid substance in a liquid, transport the solid substance together with the liquid, and then separate only the solid substance from the liquid. As an example of separating the solid matter from the liquid for transportation, there is a pellet obtained by melting and kneading a synthetic resin powder.

For example, a synthetic resin powder is melted and kneaded, and an extruded rubber-like composition is cut into pellets, cooled with cooling water or the like, and then conveyed together with the cooling water. It is compressed into bale and shipped to each market. By the way, the pellets manufactured in this way may have different post-processes depending on the quality requirements at the shipping destination. In such a case, as shown in FIG.
In the middle of the transport path 2 for circulating the cooling water, two passages 4,
6 and a branch valve 8 are provided, and cooling water is caused to flow through the one passage 4 or the other passage 6 selected by the branch valve 8 so that the manufactured pellets are taken out from the different passages.

Here, as shown in FIGS. 6A and 6B, the branch valve 8 for switching the flow path has a first port 12,
A casing 18 having a second port 14 and a third port 16 and a substantially cylindrical valve body 20 having a flow passage 19.
By changing the position of the valve body 20 in the casing 18, the solid-liquid mixture composed of the cooling water and the pellets in the first port 12 is discharged through the flow passage 19 to the second side.
It is selected whether the current flows to the port 14 or the third port 16.

[0005]

By the way, in the conventional solid-liquid mixture conveying apparatus in which such a branch valve 8 is interposed, the action of the branch valve 8 causes the conveying path 2 to be temporarily closed. There is. That is, as shown in FIG. 6A, the valve body 20 has the first port 12 and the second port 1.
When in the first position in communication with 4, the solid-liquid mixture flows from the first port 12 to the second port 14 and not to the third port 16 as indicated by arrow A. .

When the valve body 20 is operated from the outside in this state to the state shown in FIG. 6B, the first port 12 and the second port 14 which have been in communication until now are completely connected. It will be cut off. Then, when the valve body 20 further rotates in the direction of the arrow from the state of FIG. 6B, the first port 12 and the third port 16 are opened via the flow passage 19. Here, in a state immediately before the first port 12 and the third port 16 communicate with each other, the transport path 2 shown in FIG. 5 is temporarily closed and the first port 1
The solid-liquid mixture in 2 cannot flow anywhere.
In that case, the internal pressure in the transport path 2 increases, which is not preferable.

In view of the above situation, the present invention requires pressure when the solid material is conveyed along with the liquid phase in a conveying path having two supporting conveying paths because the inside of the conveying path is closed. It is an object of the present invention to provide a solid material conveying device that does not increase more than the above. Moreover, it aims at providing the suitable conveying method for conveying the pellet of a superposition | polymerization apparatus using this.

[0008]

In order to achieve the above object, a solid material conveying apparatus according to the present invention is (1) a pipe is formed and a solid material is conveyed along with the flow of a liquid phase flowing in the pipe. (2) pressure applying means for applying a pressure to the liquid phase in the above-mentioned transfer path to cause the liquid phase to flow to one side; and (3) connecting to the above-mentioned transfer path, and the above-mentioned transfer path Solid matter supply means for supplying a solid matter into the liquid phase therein, and the transportation path branches into two or more branch transportation paths downstream of the fixed matter supply means, and (4) It has a switching means which is arranged at the branching portion and switches between the flow to one of the sub-conveyance paths and the flow to the other sub-conveyance path, and when the switching means is at the first position. , The flow of the liquid phase flows to the support transport path of 1, and the switching means,
When in the second position, the flow of the liquid phase flows to the other sub-conveyance path, and when the switching means is between the first position and the second position, the flow of the liquid phase. Is characterized in that it flows in both one support transport path and the other support transport path.

According to the present invention having such a configuration, the solid matter conveyed from the solid matter supplying means into the conveying path by the pressure from the pressure applying means is passed through the branch pipe to one of the tributary conveying paths or the other. Can be selectively transported to any of the sub-transport routes. Moreover, since the branch pipe allows the fluid to flow through both the one support transport path and the other support transport path during the switching, the pipeline is not blocked. Therefore, the internal pressure in the pipe does not rise too much.

Here, it is preferable to have (5) a solid material recovery means for recovering the solid material in the liquid phase in a part or all of the above-mentioned two or more branch conveyance paths. With such a configuration, the solid matter can be easily taken out. In addition, the switching means is connected to the upstream side of the transport path.
, A second port that communicates with the above-mentioned one support transport path, and a third port that communicates with the other support transport path, a disk-shaped top plate and bottom plate, and these top plates and A first partition wall body that is erected so as to connect the outer peripheral surfaces of the bottom plate to each other, and is erected so as to face the first partition wall body with a predetermined distance therebetween, and to have a diameter that is larger than that of the first partition wall body. A branch valve comprising: a second partition that is erected so as to connect the outer peripheral surfaces on one side, and that can rotate in the casing; The width is W1, the width of the second port is W2, and the width of the third port is W.
3, the width of the casing wall between the second port and the third port is D23, the length of the first partition wall body is S1, the length of the second partition wall body is S2, Then S1
<S2, S1 <W1, and S2 <
It is preferable that the branch valve has a relationship of W2 + D23 + W3.

With such a structure, it is possible to easily switch the fluid path and prevent an increase in pressure in the path at the intermediate position. Further, the solid material supply means, melting the solid material, an extruder for extruding from the die after kneading, the solid material extruded from the extruder to obtain pellets by continuously cutting with a rotary blade, a cutting device It is preferable that

With such a structure, it is suitable for conveying pellets that are kneaded by the extruder, extruded, and then cut, and the pellets are conveyed in two systems when the processing steps after cooling the pellets are different. be able to. Further, if it is used in a carrying method using such a carrying device, it can be preferably used for carrying pellets and the like.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a solid material carrying device 30 according to an embodiment of the present invention. As shown in FIG. 1, the conveying device 30 includes an extruder 32, a die 34 arranged on the downstream side of the extruder 32, and a cutting device 36 arranged on the downstream side of the die 34. . The rotary blade 38 of the cutting device 36 is housed in a cooling chamber 40 that contains cooling water. In addition, these extruders 3
2, the die 34, and the cutting device 36 constitute a solid material supply means.

The extruder 32 has a cylinder body 42 having a substantially cylindrical shape. Inside the cylinder body 42,
A screw 44 is housed. The screw 44 is rotationally driven by a motor (not shown). The raw material resin supplied into the extruder 32 is sent to the downstream side by the rotation of the screw 44 while being melt-kneaded. Then, the molten resin sent to the downstream side, after passing through the die 34 placed in water, is continuously cut into pellets by the rotary blade 38 of the cutting device 36 and cooled in the cooling chamber 40. It

The cooling chamber 40 has two openings 52,
56 is formed, and the transport path 50 is connected to these openings 52 and 56. The transfer path 50 is branched into a first support transfer path 58 and a second support transfer path 60.
A branch valve 62 is provided as a switching means.
A water storage tank 63 is installed on the downstream side of the sub-conveyance paths 58 and 60, and the cooling water as a liquid phase returned to the water storage tank 63 is re-introduced into the cooling chamber 40 via a pump 64 as a pressure applying means. It is supposed to be returned to. The temperature of the cooling water rises by cooling the melt-kneaded raw material resin. In order to compensate for this temperature rise and use again as suitable cooling water, it is preferable to install a heat exchanger at the outlet of the pump 64 to remove the heat in the cooling water.

The branch valve 62 used in this embodiment is shown in FIG.
And a casing 65 having a flow path on three sides as shown in FIG.
As shown in FIG. 3, it has a substantially cylindrical valve body 66 accommodated therein. The casing 65 includes a first port 68, a second port 70, and a third port 72, and the flow of the fluid supplied to the first port 68 allows the passage 84 formed in the valve body 66. Via either the second port 70 or the third port 72.

The valve element 66 has a disk-shaped top plate 76 on which the rotating shaft 74 is supported, and a disk-shaped bottom plate 78, and the first partition wall so as to connect the outer peripheral surfaces thereof. A body 80 and a second partition body 82 are provided. First partition body 8
0 stands upright from the outer peripheral edge of the bottom plate 78, but the second partition 82 stands upright from a position inside the outer peripheral edge of the bottom plate 78. In addition, as shown in FIG.
When the formation width of the partition wall body 80 is S1 and the formation width of the second partition body 82 is S2, S1 <S2. Also,
The width of the first port 68 is W1, the width of the second port 70 is W2, the width of the third port 72 is W3, and the second port 70.
The width of the casing wall between the second port 72 and the third port 72 by D23
Then, the relationship of S2 <W2 + D23 + W3 is set. Further, the width S1 of the first partition body 80 substantially corresponds to the shape of the casing 65 wall body.

According to such a branch valve 62, the main passage 84 through which the fluid flows is formed between the first partition wall body 80 and the second partition wall body 82, and the second partition wall body 82 is formed. A sub passage 86 for fluid is formed on the outside. In addition, the valve body 66 of the branch valve 62 operates the rotary shaft 74 by applying an external force to a manual operation portion provided on the outside of the casing 65. ),
Switching can be performed as in (B) and (C).

The operation of the branch valve 62 will be described below. Here, the state of FIG. 4A is the first position of the valve element 66. In this first position, the first port 68 communicates with the second port 70, and a flow passage is formed therein. Therefore, the solid-liquid mixture containing the solid is
It will flow from the first port 68 through the second port 70. In addition, the state of FIG.
In the second position, the first port 68 communicates with the third port 72, and a flow passage is formed therein. Therefore, fluid will flow through the first port 68 to the third port 72.

On the other hand, when the state of FIG. 4B is set to the intermediate position, the first port 68 and the second port 70 are not in direct communication with each other at this intermediate position, and the third port The ports 72 communicate with each other. Therefore, at this intermediate position, all three ports 68, 70, 72 are in communication. This intermediate position is shown in FIG.
FIG. 5 shows a state when switching from the state of (A) to the state of FIG. 4 (C).

In such a branch valve 62, the first port 68 thereof is used as the conveyance path 50, the second port 68 is used as the first support conveyance path 58, and the third port 72 is used as the second support conveyance path. 60, respectively. Therefore, the valve body 6
If 6 is set to the first position as shown in FIG. 4 (A),
The fluid flowing through the transfer path 50 will flow into the first support transfer path 58 via the main passage 84 of the valve element 66. Further, when the valve element 66 is set to the second position as shown in FIG. 4 (C), the fluid flowing in the transfer path 50 passes through the main passage 84 of the valve element 66 to the second support transfer path. It will flow into 60.

On the other hand, while the flow path which has been flowing in the sub-conveyance path 58 is being switched to the sub-conveyance path 60, while the intermediate position in FIG. Less. After that, while gradually increasing the amount of flow to the second sub-conveyance route 60, the fluid finally reaches the second position as shown in FIG. 4C, and all the fluid flows to the second sub-conveyance route 60. It comes to flow. Therefore, according to the present embodiment, the pipeline is never blocked during switching.

If such a solid material conveying device is applied to a polymerization device for olefins or the like, the pellets temporarily stored in the cooling chamber 40 can be introduced into the first branch conveying route 58 together with the cooling water. Alternatively, it can be switched to be guided into the second branch conveyance path 60. Therefore, if the pellets are separated from the cooling water in the sub-conveyance route 58 or the sub-conveyance route 60, the pellets can be taken out from different places according to the purpose. As a result, in the case where the post-process of the manufactured pellets is different, it is possible to divide the product into another place for sorting. Further, since the cooling water after taking out the pellets can be returned to the cooling chamber 40 via the water storage tank 63 and the pump 64, the amount of water to be processed can be small.

According to this embodiment, the branch valve 62
Since all three ports are in communication when the fluid flow path is switched by, the internal pressure does not rise abnormally. The embodiment of the present invention has been described above.
The present invention is not limited to the above embodiment, and various changes can be made.

For example, in the above embodiment, the present invention is applied to the pellet conveying method in the polymerization apparatus, but the present invention is
It can be applied to other solid-liquid mixture conveying devices for conveying solids and solutions. The experimental results of the present invention are shown below together with comparative examples.

[0026]

[Comparative Example] Resin extruded from a die of an extruder that continuously treats 50 Kg / h of resin was filled with cooling water flowing at a speed of 1.5 m ³ / h. Immediately after being extruded from the die, it was cut and pelletized with a rotating device having a cutter blade, cooled with cooling water, and conveyed.
After that, the cooling water and the pellets were separated downstream, and the pellets were filled as a product, while the cooling water was recovered and recooled, and then recirculated to the rotating device of the extruder. Since there are cases where the filling method is different, a conventional flow path switching three-way valve was installed in the flow path to switch the flow path, and the switching operation of the cooling water separation device and the cooling water flow path was performed similarly in the downstream. At that time, the flow passage was closed at the moment of switching the flow passage, and the internal pressure of the flow passage was temporarily increased to 0.5 MPa-G (pump discharge pressure) against the normal pressure of 0.2 MPa-G. Since the gap between the die of the resin extruder located upstream of the flow path and the cutting device changes subtly with the internal pressure, defective cutting and shape failure of the resin frequently occurred as the internal pressure increased.

[0027]

[Example] In the same equipment as the comparative example, when the flow path branch valve was replaced with the one that does not close the flow path when switching the flow path described in the present invention, an increase in internal pressure was observed even when switching the flow path. However, it was constant at 0.2 MPa-G. As a result, pellets of the same diameter and the same type were continuously and stably obtained.

As described above, the effect of the present invention was confirmed by the experiment comparing the comparative example with the example.

[0029]

According to the solid material carrying apparatus of the present invention, when carrying the solid material together with the liquid phase, the internal pressure in the carrying path does not rise excessively. Further, the solid matter can be taken out from different places as needed. Therefore, if such a conveying device is applied to the conveyance of pellets, the pellets conveyed by the cooling water can be conveyed to and taken out from different branch conveyance routes depending on the quality requirements and the like. Further, even when the sub-conveyance route to be conveyed is switched by the switching means, the flow of the liquid phase flows in both one sub-conveyance route and the other sub-conveyance route, so that the pipeline is blocked. There is no such thing.

Further, the solid matter can be easily collected by installing the solid matter collecting means. Further, if the switching means according to the present invention is configured by the above branch valve, it is possible to prevent the internal pressure from rising. Therefore, if such a solid material conveying apparatus is applied to the pellet conveying method, the pellets can be continuously and stably conveyed.

[Brief description of drawings]

FIG. 1 is a schematic view of a pellet conveying device in which a solid substance conveying device according to the present invention is adopted.

FIG. 2 is a plan view showing a casing of a branch valve adopted in the same embodiment.

FIG. 3 is a perspective view showing a main part of a valve body adopted in the same embodiment.

FIG. 4 (A), FIG. 4 (B), and FIG. 4 (C) are cross-sectional views showing the action of the branch valve.

FIG. 5 is a plan view showing a conventional flow path branch valve.

FIG. 6 is a cross-sectional view showing the operation of a conventional branch valve.

[Explanation of symbols]

30 carrier 38 cutting means 40 cooling room 50 transport routes 58 First support route 60 Second branch transport route 62 branch valve (switching means) 64 pumps (pressure application means) 65 casing 66 valve 68 First Port 70 Second Port 72 Third Port 76 Top plate 78 Bottom plate 80 First partition 82 Second partition body

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takanori Harada             3 Chikusaigan, Ichihara, Chiba Prefecture Mitsui Chemicals Stock Association             In-house F term (reference) 3F047 AA03 BA08                 4F201 AA45 BA02 BC01 BC02 BL11                       BL21 BQ05 BQ20 BQ21 BQ32                       BQ35 BQ44

Claims (5)

[Claims] (1) A conveying path that forms a pipe and can convey a solid material along with the flow of a liquid phase flowing in the pipe, and (2) a pressure is applied to the liquid phase in the conveying path. And a pressure applying means for causing the liquid phase to flow to one side, and (3) a solid material supplying means that is coupled to the transportation path and supplies a solid material into the liquid phase in the transportation path, In addition, the transport route branches into two or more branch transport routes downstream of the fixed object supply means, and (4) is disposed in the branch portion, and the flow to one branch transport route and other When the switching means is in the first position, the liquid phase flows to one of the sub-conveyance paths, and the switching means changes to the second sub-conveyance path. In the position of, the flow of the liquid phase flows to the other sub-conveyance route, and the switching means changes the first Location and when in the middle of the second position, the flow of the liquid phase flowing to both the first 支搬 feed path and other 支搬 feed path, characterized in that, the transport device of the solids. 2. The solid recovery means for recovering solids in a liquid phase (5) in a part or all of the two or more branch conveyance paths, the method according to claim 1. Conveyor for solid objects. 3. The switching means comprises a first port communicating with the upstream side of the carrying route, a second port communicating with the first supporting carrying route, and a third port communicating with the other supporting carrying route. A casing provided with, a disc-shaped top plate and a bottom plate, a first partition wall body that is erected so as to connect the outer peripheral surfaces of the top plate and the bottom plate, and a predetermined distance from the first partition wall body. A second partition member that is erected so as to be spaced apart and facing each other, and that is erected so as to connect the outer peripheral surfaces on the radially inner side of the first partition member, and rotates in the casing. And a valve body, wherein the width of the first port is W1, the width of the second port is W2, the width of the third port is W3, and the second port is The width of the casing wall between the third port is D23.
And the length of the first partition wall body is S1 and the length of the second partition wall body is S2, S1 <S2, and
The solid conveying apparatus according to claim 1, wherein the branch valve has a relationship of S1 <W1 and S2 <W2 + D23 + W3. 4. The solid material supplying means melts and kneads the solid material and then extrudes it from a die, and the solid material extruded from the extruder is continuously cut by a rotary blade to obtain pellets. , A cutting device,
The solid material conveying device according to claim 1. 5. A method for transporting solid matter, which comprises using the apparatus for transporting solid matter according to any one of claims 1 to 4.