JP2009180332A - High-temperature fluid material transfer device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-temperature fluid material transfer device for transferring a high-temperature fluid material such as a polymerized material extracted from a polymerizing tank while suppressing the solidification of the high-temperature polymerized material and avoiding the deterioration of production efficiency even if the solidified material is accumulated in the transfer device. <P>SOLUTION: The transfer device 11 comprises a pipe 14 covered with a temperature retaining heat medium jacket 27 for transferring the high-temperature fluid material such as the polymerized material. The heat medium jacket 27 is composed of a pair of half-split heat medium jacket members 13, 13 forming a cylindrical shape alternately being overlapped with each other. The pipe 14 is inserted through the cylindrical heat medium jacket 27, and the pipe 14 is detachably connected to an extraction port for the high-temperature fluid material. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a transfer device suitable for transferring a high-temperature liquid material that easily solidifies, such as a polymer such as aromatic polyester extracted from a polymerization tank.

  Crystalline polyesters such as polyethylene terephthalate and polybutylene terephthalate and crystalline polyesters containing p-benzoic acid as one component are excellent in heat resistance and solvent resistance, and are used in various electronic parts and industrial parts. . In general, in the polymerization reaction process of aromatic polyester, which is a crystalline polyester, if the polymerization proceeds while stirring, the viscosity of the reaction system increases, the stirring load increases, and further stirring is difficult. Become. Therefore, a method is employed in which the prepolymer of the aromatic polyester is extracted from the polymerization tank in the middle of the polymerization reaction, cooled and solidified, and then pulverized as necessary, and then heated again to complete the polycondensation reaction.

  Aromatic polyesters have the property of rapidly increasing in viscosity and solidifying with a decrease in temperature. Therefore, when the aromatic polyester is transferred from the prepolymerization tank (hereinafter simply referred to as the polymerization tank) to the double belt type cooler (hereinafter referred to as the belt cooler), the aromatic polyester extracted from the polymerization tank is immediately sent to the belt cooler. Preferred (see Patent Document 1). However, normally, as shown in FIG. 5, two polymerization tanks 30 and 31 are installed for one belt cooler 32, and the aromatic polyester is alternately transferred to the belt cooler. For this reason, at least one of the polymerization tanks 31 must be disposed at a position away from the inlet side of the belt cooler 32, and therefore requires a transfer means 34.

Therefore, conventionally, a heat medium double pipe in which the inner pipe for flowing the aromatic polyester is covered with a heat medium jacket so that the temperature of the aromatic polyester flowing inside the pipe is not lowered and solidified during the transfer of the aromatic polyester. Aromatic polyester is transferred using The transferred aromatic polyester is cooled and solidified by a belt cooler 32 and pulverized by a pulverizer 33.
JP-A-6-256485

  When the aromatic polyester is transferred using the above-described heat medium double tube, the solidified product of the aromatic polyester gradually adheres to the inner wall surface of the inner tube, and thus the inner tube needs to be cleaned. However, since the inner pipe cannot be cleaned with the heat medium double pipe as it is, it is necessary to remove the inner pipe, but it is difficult to remove the inner pipe.

  On the other hand, in order to facilitate cleaning, it has been proposed to transfer the aromatic polyester using a scissor with the upper open part covered with a lid and a heat medium jacket attached to the lower part instead of the heat medium double pipe. ing. However, foreign substances are likely to be mixed into the aromatic polyester during the transfer of the aromatic polyester or during the cleaning of the basket. Further, there is a problem that the aromatic polyester is easily solidified by radiating heat from the upper open portion of the bag during the transfer, and the solidified material adhering to the bag hinders the flow of the aromatic polyester. Therefore, it is necessary to periodically clean the bag, and the production efficiency is lowered by stopping the manufacturing apparatus for this cleaning.

  The present invention has been made in view of the above problems, and suppresses the solidification of the high-temperature liquid material when transferring a high-temperature liquid material that is easily solidified such as a polymer extracted from the polymerization tank. An object of the present invention is to provide a high-temperature liquid material transfer device that does not reduce the production efficiency even if a solidified material is deposited in the transfer device.

The apparatus for transferring a high-temperature liquid material according to the present invention is such that a pipe for transferring the high-temperature liquid material is inserted into a cylindrical heat retaining heat medium jacket, and the pipe is detachably connected to the outlet for the high-temperature liquid material. Features.
The heat medium jacket may be composed of a pair of halved heat medium jacket members that are superposed on each other to form a cylindrical shape.

  In the present invention, the pair of both halved heat medium jacket members are preferably connected to each other at their side ends so as to be freely opened and closed by hinges. In the present invention, the pipe is preferably a pipe having an inner diameter of 40 mm or less.

  Examples of the high temperature liquid material include, but are not limited to, high temperature liquid polymers such as aromatic polyester extracted from the above-described polymerization tank, and the same applies to various high temperature liquid materials. It is applicable to.

  According to the present invention, the pipe is inserted into a heat medium jacket, and the high-temperature liquid material is hardly solidified in the pipe by being kept warm by the heat medium. Moreover, since the pipe is detachably connected to the outlet for the high temperature liquid material, even if the high temperature liquid material is solidified in the pipe, it can be replaced with a new pipe, which can reduce the production efficiency. Absent.

  In addition, when the heat medium jacket is composed of a pair of half-shaped heat medium jacket members, the pipe can be easily replaced with a new pipe by opening the half-shaped heat medium jacket and removing the pipe. In addition, the pipe removed during the transfer operation by the new pipe can be cleaned.

  Furthermore, according to the present invention, by setting the inner diameter of the pipe to a small diameter of 40 mm or less, the average flow velocity in the pipe can be increased, thereby reducing the amount of solidified material adhering to the wall surface of the pipe.

  Hereinafter, a transfer device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing an embodiment of the transfer device of the present invention, FIG. 2 is a cross-sectional view showing a state where a half-shaped heat medium jacket member is opened, and FIG. 3 is a view of a pipe provided in the transfer device. 4 is a front view of the inlet side (inflow side) of the pipe.

  The transfer device according to this embodiment is applied to the aromatic polyester flow path from the outlet of the polymerization tank to the belt cooler in an aromatic polyester production apparatus having a polymerization temperature of 300 ° C. or higher. As shown in FIG. 1, at the lower outlet of the polymerization tank, a filter 10 for removing solidified substances mixed in the extracted high-temperature aromatic polyester (high-temperature liquid), and the filter 10 The transfer device 11 connected by the discharge pipe 19 and the binding band 23 and arranged so as to be inclined so that the outlet side in the transfer direction is downward, and the chute 12 connected to the transfer device 11 are in the transfer direction of the aromatic polyester. Are provided in order. Further, for example, as shown in FIG. 5 described above, when alternately transferring from both of the two polymerization tanks, transfer apparatuses 11 and 11 are arranged for each polymerization tank, and the outlet side end of each transfer apparatus What is necessary is just to couple | bond and connect the flange provided in 1 and the heat-medium jacket connection parts 28 and 28 of the chute | shoot 12 with a volt | bolt and a nut.

  As shown in FIGS. 1 and 2, in the transfer device 11, the pipe 14 is inserted into a cylindrical heat medium jacket 27 including a pair of half-shaped heat medium jacket members 13 and 13. The half-shaped heat medium jacket member 13 has a tube body 15 for flowing the heat medium on the inner peripheral side, and for example, hot oil or the like is used as the heat medium. And the heat insulating material 16 for preventing the heat dissipation of heat media, such as glass wool, has covered the outer periphery of the pipe body 15 which flows a heat medium. In addition, the heat medium inlet 25 for allowing the heat medium to flow into the pipe body 15 through which the heat medium flows is provided on the inlet side in the transfer direction of the aromatic polyester, and the heat medium outlet 26 for allowing the heat medium to be transferred to the aromatic polyester. Provided on the exit side of the direction. The halved heat medium jacket members 13 constituting the heat medium jacket 27 are fixed to each other by a hinge 17 at one of the side end portions in contact with each other and a stopper 18 such as an adjust fastener. As the stopper 18, in addition to the adjust fastener, for example, a flange may be provided at a side end portion of the half-shaped heat medium jacket member 13, and the flanges may be coupled and fixed with bolts and nuts.

FIG. 3 shows the pipe 14 inserted through the transfer device 11. Since this pipe 14 is connected to the discharge pipe 19 of the filter 10, the diameter W2 at one end is substantially the same as the diameter of the discharge pipe 19 of the filter. In order to increase the flow rate of the aromatic polyester in the tube, the diameter W1 is smaller than the diameter W2 at one end. That is, it is preferable that the diameter of the pipe 14 is reduced. The diameter W1 of the pipe 14 is preferably 50% or more of the inner diameter of the heat medium jacket in order to enhance heat transfer from the heat medium jacket 27. Specifically, the diameter W1 of the pipe is preferably 40 mm or less. The diameter W1 is more preferably 25 mm or less.
In this way, by reducing the diameter W1 of the pipe 14 and increasing the flow rate of the aromatic polyester in the pipe 14, the retention of the aromatic polyester near the pipe wall surface in the transfer device 11 is reduced, and the viscosity is increased. Therefore, the solidification amount of the aromatic polyester adhering to the inside of the pipe 14 can be suppressed. Specifically, the average flow velocity of the aromatic polyester in the pipe 14 is preferably 0.5 m / second or more, more preferably 1.0 m / second or more.

  As shown in FIGS. 3 and 4, a stopper provided with an insertion hole 29 through which an eyebolt 20 for fixing the pipe 14 to a predetermined installation position when the pipe 14 is installed in the heat medium jacket 27 is inserted in the inlet portion of the pipe 14. 21 is provided. That is, since the heat medium jacket 27 is inclined and disposed so that the outlet side in the transfer direction is downward, the stopper 14 prevents the pipe 14 from sliding down in the inclination direction when the pipe 14 is installed on the heat medium jacket 27. . Further, a handle 22 is attached to the pipe 14 in order to facilitate attachment and detachment to the heat medium jacket member 27.

  As shown in FIG. 1, the filter 10 connected to the inlet side of the pipe 14 is connected to the lower end of the polymerization tank, and is punched with a large number of through holes for filtering the solidified material mixed in the aromatic polyester. A plate (not shown) is provided inside, and a discharge pipe 19 for connecting to the pipe 14 is provided. In the present embodiment, the pipe 14 and the filter 10 are connected by the binding band 23 as described above. In addition to the binding band 23, the end of the discharge pipe 19 of the filter and the inlet-side end portion of the pipe 14 are used. Each may be provided with a flange, and the flanges may be connected with a bolt and a nut.

  The chute 12 connected to the outlet side of the pipe 14 is hollow, and is provided on each of a rectangular parallelepiped chute main body portion that is open at the lower surface and faces the introduction portion of the belt cooler, and a side surface and a relative surface of the chute main body portion. Heat medium jacket connection portions 28 and 28 are provided.

(Polymer transfer method)
The aromatic polyester is extracted from the polymerization tank, and the flow rate is adjusted by a flow control valve (not shown) provided at the outlet at the lower end of the polymerization tank. The aromatic polyester may be taken out from the polymerization tank by a pump instead of the flow rate control valve.

  The extracted aromatic polyester passes through the filter 10 so that solids in the aromatic polyester are separated by filtration. The filtered aromatic polyester is transferred to the chute 12 via the transfer device 11. When transferring, a heat medium having substantially the same temperature as the polymerization temperature of the aromatic polyester (usually 300 ° C. or higher) is passed through the pipe body 15 through which the heat medium provided inside the half-shaped heat medium jacket member 13 flows. It flows from the inlet 25 and is discharged from the heat medium outlet 26. As a result, the aromatic polyester being transferred through the pipe 14 is kept warm by the heat medium, and an increase in viscosity and solidification caused thereby can be suppressed. Then, the average flow rate of the aromatic polyester in the pipe 14 is preferably 0.5 m / s or more, more preferably 1.0 m / s or more as described above, by the flow rate control valve so that the aromatic polyester adheres to the pipe 14. The solidification amount of the aromatic polyester can be suppressed.

  The flowing liquid aromatic polyester hits the chute 12 and falls to a belt cooler that is a cooling means disposed under the chute 12. The cooling means is not limited to a double belt type cooler, but may be a single belt type cooler, that is, a type of belt cooler that cools and solidifies while placing and conveying a liquid material on the belt. In the belt cooler, an upper belt and a lower belt made of metal endless belts each having corrosion resistance such as a steel belt are arranged in close contact with each other, and cooled while sandwiching an aromatic polyester between the upper and lower belts. Device.

(Pipe replacement and cleaning)
When cleaning the adhered matter of the aromatic polyester adhering to the inner wall of the pipe 14, as shown in FIGS. 1 and 2, the eyebolt 20 provided on the pipe 14 is removed from the heating medium jacket 27, and then the adjustment fastener 18 , The half-shaped heat medium jacket members 13 and 13 connected by the hinge 17 are opened, the binding band 23 is removed, and the pipe 14 is removed. When removing the pipe 14, hold the handle 22 and remove it. Then, the next transfer operation can be started immediately by installing a new pipe 14 that has been cleaned. Furthermore, by cleaning the removed pipe 14 during the transfer operation with the new pipe 14, the pipe 14 can be cleaned without deteriorating the production efficiency of the aromatic polyester.

It is a side view of the side which installed the hinge of the transfer apparatus of this invention. It is a cross-sectional view of the transfer device in a state where the half-shaped heat medium jacket member is opened. It is a side view of the pipe with which the transfer apparatus of this invention was equipped. It is a front view of the inlet side of the pipe with which the transfer apparatus of this invention was equipped. It is a schematic side view which shows one Embodiment of the manufacturing apparatus of the conventional polymer.

Explanation of symbols

10: Filter 11: Transfer device 12: Chute 13: Half-shaped heating medium jacket member 14: Pipe 15: Tube body 16 through which the heating medium flows 16: Insulation material 17: Hinge 18: Adjustment fastener 19: Discharge pipe 20: Eye bolt 21 : Stopper 22: Handle 23: Bundling band 25: Heat medium inlet 26: Heat medium outlet 27: Heat medium jacket 28: Heat medium jacket connection part 30, 31: Polymerization tank

Claims (6)

  An apparatus for transferring a high-temperature liquid material, characterized in that a pipe for transferring a high-temperature liquid material is inserted into a cylindrical heat-retaining heat medium jacket, and the pipe is detachably connected to an outlet for the high-temperature liquid material.   2. The high-temperature liquid material transfer device according to claim 1, wherein the heat medium jacket is composed of a pair of half-shaped heat medium jacket members that overlap each other to form a cylindrical shape.   The high-temperature liquid material transfer device according to claim 2, wherein the pair of both halved heat medium jacket members are connected to each other at their side ends by a hinge so as to be freely opened and closed.   The high-temperature liquid material transfer apparatus according to any one of claims 1 to 3, wherein the pipe is a pipe having an inner diameter of 40 mm or less.   The high temperature liquid material transfer device according to any one of claims 1 to 4, wherein the high temperature liquid material is a high temperature liquid polymer extracted from a polymerization tank.   The high temperature liquid material transfer device according to claim 5, wherein the polymer is an aromatic polyester.

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