JPH0311299B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a continuous processing apparatus for highly viscous substances,
In particular, it relates to a continuous processing apparatus suitable for continuous polycondensation of polyethylene terephthalate, polycarbonate, and the like.

[Background of the invention]

Generally, in continuous processing such as kneading and reaction of highly viscous substances, it is required to minimize the dead space within the apparatus and to perform operations similar to extrusion flow. For this purpose, various designs have been devised in which a horizontally long cylindrical container is used and two stirring blades are installed in the longitudinal direction. For example, Special Public Interest Publication No. 52-29019
As shown in the issue, there is a structure in which paddle blades are arranged in multiple stages to scrape the entire inner surface of the container to reduce the dead space, but when the liquid to be treated has a high viscosity of several thousand poise or more, However, there is a problem in that the liquid adhering to the surface of the rotating shaft rotates together and causes scaling. Therefore, an attempt was made to eliminate this rotating shaft and reduce the rotation, and as proposed in Japanese Patent Publication No. 49-40732, the outer periphery of a partially hollowed out disk was connected to eliminate the rotating shaft. There is something I did. As a result, there is no co-rotation around the rotating shaft, but the highly viscous liquid attached to the surface of the disc-shaped stirring blade is difficult to flow and co-rotates around the blade, causing scaling etc. [Object of the invention] The purpose of the present invention is to solve the problems of the prior art, to sufficiently reduce the dead space caused by the co-circulation of liquid in the container, to prevent scaling, etc., and to provide a continuous process that allows high-quality processed products to be obtained. The purpose of this invention is to provide a processing device.

[Summary of the invention]

The present invention was developed by focusing on the fact that a problem with conventional devices is the adhesion of highly viscous liquids to the rotating shaft and the surface of plate-shaped stirring blades. We propose a continuous processing device for highly viscous substances that has a spiral stirring blade with a rod-like structure that can thoroughly scrape the inside of a container and also provide a liquid feeding effect.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In the figure, reference numeral 1 denotes a container body of the processing apparatus, which is an oblong cylindrical container having a cross section shown in FIG. 2, and is generally covered on the outer periphery with a heat medium jacket (not shown). Reference numeral 2 denotes rotary ear shafts attached to both ends of the container body 1, and either the left or right rotary ear shaft 2 is connected to a drive device (not shown). A rod-shaped member 3 is provided between the rotary ear shafts 2 at both ends of the container body 1.
Spiral members 4a, 4 connected to each other at a, 3b
Stirring blades 5a and 5b composed of b are attached. Here, the helical members 4a and 4b have different twisting directions, and the respective rod-like members 3a and 3b have a phase angle of 90 degrees with respect to each other when viewed from the direction of the rotary ear shaft 2, and one spiral Member 4a
is held so as to pass as close as possible to the center of rotation of the other rod-shaped member 3b, and rotates in a direction that lifts the liquid in the container body 1 inside. Further, the outer peripheral ends of the spiral members 4a and 4b rotate sufficiently close to the inner wall surface of the container body 1. As a result, while the liquid to be treated is stirred within the main body 1, the spiral members 4a and 4b provide a liquid feeding effect in the longitudinal direction of the main body 1. Here, the rotary ear shaft 2 is supported by a bearing 6 fixed to the side surface of the container body 1. Furthermore, 7 and 8 are the inlet and outlet nozzles for the liquid to be treated, respectively;
9 is a volatile outlet nozzle.

The highly viscous liquid to be treated that has entered the container body 1 from the inlet nozzle 7 is subjected to a mixing action by the stirring blades 5a and 5b, and at the same time receives a liquid feeding action, and moves toward the outlet nozzle 8. After performing the desired processing operation, it is continuously taken out from the outlet nozzle 8. At this time, the tips of the spiral members 4a and 4b of the stirring blades 5a and 5b are connected to the opposite stirring blade 5.
a, 5b, and rotates while scraping the inner wall surface of the container body 1 to send the liquid toward the outlet.Furthermore, since these stirring and liquid feeding actions are performed by a rod-shaped structure, the dead space is sufficiently reduced. You can. As a result, the adhesion of liquid to the surface of the rotating shaft and the surface of the plate-shaped stirring blade, which has been a problem with conventional devices, and co-rotation are almost eliminated.

When condensation polymerization of polyethylene terephthalate, polycarbonate, etc. is carried out using the continuous processing apparatus of the present invention, the viscosity of the liquid to be treated increases from several thousand poise to tens of thousands of poise due to the polymerization reaction, but the dead space can be reduced by sufficient stirring action. It is possible to almost eliminate them, obtain a good surface renewal effect, and obtain a high-quality polymer. At this time, volatile substances such as ethylene glycol, which are secondary substances, are discharged from the volatile substance outlet nozzle 9 via a vacuum device (not shown). In such an operation for removing volatile matter from a high viscosity liquid, the stirring blade 5 is moved in the direction of lifting the liquid inside the container body 1 by this device.
By rotating a, 5b, the stirring blades 5a,
Since the tips of the tips 5b have a tearing effect on the liquid to be treated when they move away from the mutually engaged state, the surface renewal effect is further enhanced, and the volatile matter removal effect is further improved.

In a preferred embodiment of the invention, a rotary ear shaft 2, rod-like members 3a, 3b and a spiral member 4 are provided.
By making a and 4b hollow and having a structure in which the heating medium is circulated inside, in addition to removing heat from the heating medium jacket (not shown) from the wall surface of the container main body 1, reaction heat and stirring heat are transferred to the rod-shaped member 3a. , 3b and the surfaces of the spiral members 4a, 4b, the temperature of the liquid to be treated can be kept constant and the quality can be improved.

In a further recommended embodiment, as shown in FIG. 4, instead of the rod-like members 3a and 3b, a rod-like member 10 has a flat cross-sectional shape and is angled with respect to the longitudinal direction of the container body 1. Thereby, the liquid feeding effect can be adjusted, such as further strengthening the liquid feeding effect of the liquid to be treated in the longitudinal direction of the container body 1, or reducing the liquid feeding effect by attaching the container in the opposite direction.

In still another embodiment, as shown in FIG. 5, three spiral members 11 are used, and these are connected by a Y-shaped rod member 12 to form a stirring blade, and two stirring blades are arranged in a Y-shape. Rod-shaped members are arranged with a phase angle of 60 degrees from each other, which strengthens the stirring action and provides a good mixing effect.

〔Effect of the invention〕

According to the present invention, co-rotation due to adhesion of a highly viscous liquid to be treated in a container to the rotating shaft surface and plate-shaped stirring blade surface is eliminated, the dead space can be sufficiently reduced, and the liquid can be fed in the longitudinal direction of the container. Since this effect can be obtained, it is possible to prevent quality deterioration due to scaling, etc., and it is possible to continuously process high-quality, high-viscosity substances.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional plan view of a high viscosity substance continuous processing apparatus according to the present invention, FIG. 2 is a cross-sectional view at the side of FIG. A partial sectional view of a rod-shaped member showing another embodiment,
FIG. 5 is a perspective view of a stirring blade showing still another embodiment of the present invention. 1... Container body, 2... Rotating ear shaft, 3a, 3b
...Rod-shaped member, 4a, 4b...Spiral-shaped member, 5
...5a, 5b... Stirring blade, 6... Bearing, 7...
Inlet nozzle, 8... Outlet nozzle, 9... Volatile exit nozzle, 10... Bar-shaped member, 11... Spiral member, 12... Y-shaped bar-shaped member.

Claims (1)

[Scope of Claims] 1. A stirring device in which two rotating ear shafts are arranged in parallel at both ends of a horizontally installed cylindrical container, and spiral members having mutually different twisting directions are arranged between the rotary ear shafts. The blades are attached to each blade, and the corresponding stirring blades are arranged with a phase angle of 90 degrees when viewed from the axial direction, and the rotary ear shafts arranged in parallel are connected to the tip of the helical member of one of the stirring blades. A highly viscous substance continuous processing apparatus characterized in that the stirring blade is held so as to pass close to the rotation center of the other stirring blade. 2. The high-viscosity substance continuous processing apparatus according to claim 1, wherein the spiral member is formed by connecting the intermediate portions of two spiral members with a rod-shaped member. 3. The high viscosity substance continuous processing apparatus according to claim 2, wherein the rod-like member of the spiral member has a flat cross section and is attached at an angle in the longitudinal direction of the container body.