JPS6328433A - Continuous-treatment for high viscous substance - Google Patents

Abstract

PURPOSE:To prevent the liquid to be treated from being co-rotated with a stirring blade by fitting the specified stirring blade between two rotary ear shafts which are parallel provided to both end parts of the lengthwise direction of a cylindrical vessel and continuously stirring a high viscous substance and also periodically and temporarily stopping the stirring blade. CONSTITUTION:Rotary ear shafts 2a, 2b are parallel provided to both end parts of the lengthwise direction of a cylindrical vessel 1. Stirring blades 4a, 4b wherein respectively adjacent rodlike rectangular frames 3a, 3b are mutually joined with 90 deg. phase angle are fitted between the rotary ear shafts. In this constitution, high viscous liquid to be treated which is fed in the vessel 1 is subjected to stirring and mixing action by the stirring blades 4a, 4b. The rodlike rectangular frames 3a, 3b are rotated while mutually entering the rotary centers of frames 3a, 3b of the opposite side. Therefore the surface of the inside wall of the vessel 1 is scraped all over, and furthermore dead space is reduced because the stirring is performed by the rodlike structure. Further the surface of liquid is renewed and the co-rotation thereof is prevented by periodically and temporarily stopping the stirring blades 4a, 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a continuous processing method for highly viscous substances, and particularly to a processing method suitable for continuous polycondensation of polyethylene terephthalate, polycarbonate, etc.

[Conventional technology]

In general, in continuous processing such as crosstalk single reaction of highly viscous substances, it is required to minimize the dead space within the apparatus and to perform an operation similar to extrusion flow. For this reason, 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,
As shown in No. 29019, there is a structure in which the paddle ends are arranged in multiple stages to scrape the entire inner surface of the container to reduce the dead space, but the liquid to be treated has a high viscosity of several thousand poise or more. In this case, there is a problem in that the liquid adhering to the surface of the rotating shaft rotates together, causing scaling and the like. Therefore, an attempt was made to eliminate this rotating shaft and reduce the co-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. This eliminates co-rotation around the rotating shaft, but the highly viscous liquid adhering to the surface of the disc-shaped stirring blade is difficult to flow and co-rotates around the blade, causing scaling.

Furthermore, since the current device stirs at a constant speed in one direction, the liquid adhering to the surfaces of the blades etc. tends to rotate together.

[Problem that the invention seeks to solve]

The above-mentioned prior art does not take into account the issue of co-circulation, which becomes a problem when the liquid to be treated has a high viscosity of several thousand poise or more, and has one problem, which may cause scaling, etc.

An object of the present invention is to provide a continuous processing method for highly viscous substances that reduces dead space within a container and prevents liquid from co-circulating.

[Means for solving problems]

The above purpose is to install two rotary ear shafts in parallel at both ends in the longitudinal direction in a cylindrical container installed horizontally, and to connect a plurality of rod-like rectangular frame stirring blades between the rotary ear shafts in the longitudinal direction. The high viscosity substance is removed by the stirring blade by holding the rotary ear shafts arranged in parallel so that the tip of the rod-like foot-shaped frame of one of the corresponding stirring blades passes close to the center of rotation of the other stirring blade. This is achieved by carrying out a continuous stirring process and periodically stopping the stirring blade to perform a continuous stirring process.

[For production]

By passing a pair of stirring blades made up of several rod-shaped rectangular frames connected so that the tip of the rod-shaped rectangular frame of one of the corresponding stirring blades is close to the center of rotation of the other stirring blade, the dead inside the container can be removed. In addition, by temporarily stopping the rotational movement of the stirring blade, the liquid to be treated that has adhered to the stirring blade will fall under its own weight, and this can be periodically stirred. It is possible to prevent the liquid to be treated from adhering to the blades and rotating together.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. In the figure, reference numeral 1 denotes a container body of the processing device, which is a horizontally long cylindrical container with a cross section shown in Figure @2 and is installed horizontally, and its outer periphery is generally covered with a heat medium jacket (not shown). Reference numerals 2a and 2b denote rotary ear shafts arranged in parallel at both longitudinal ends of the container body 1, which are supported by bearings 5I fixed to the side surfaces of the container body 1.
a.

2bl! It is connected to a drive device IO via a drive force transmission device 59. A plurality of adjacent rod-shaped rectangular frames 3a are provided between the left and right rotary ear shafts 2a and 2b in the drawing.

Agitators 14a and 4b are attached, which are constructed by connecting 3b with a phase angle of 90 degrees.

Further, the stirring blades 4a, 4b have bar-shaped rectangular frames 3a, 3b mutually arranged in a 4-way direction when viewed from the direction of the rotary ear shafts 2a, 2b.
One bar-shaped rectangular frame 3a, 3 has a phase angle of 5 degrees.
The tip of b is the other rod-shaped rectangular frame 3b.

Pass as close as possible to the rotation center of 3a ^
The ends of the rod-like rectangular frames 3a and 3b rotate close to the inner wall surface of the container body l. 6 and 7 are inlet nozzles and outlet nozzles for the liquid to be treated, which are provided at one end and the other end in the longitudinal direction of the container body l; 8 is an outlet nozzle for the volatilization section, which is provided at the upper part of the other end of the container body l; Drive device l
This is a control device that controls the rotation of O.

In the above-described configuration, the high-viscosity liquid to be treated that is supplied into the container body 1 from the inlet nozzle 6 moves toward the outlet nozzle 7 while being stirred and mixed by the stirrs g4a and 4b, and is subjected to the intended treatment. The volatile matter generated in the container body 1 is taken out through the outlet nozzle 8. In this case, stirring g4a
The ends of the rod-like rectangular frames 3a and 3b of 4b are rotated while the rod-like rectangular frames 3b and 3a are rotating, and the inner wall recess of the container body 1 is scraped.
Since these stirring actions are carried out by the rod-shaped structure, the cord space can be sufficiently reduced.

Figure 6 shows the state of the liquid to be treated while the stirring blades 4a and 4b are rotating. Transliteration with the liquid occurs, the shape of the liquid surface becomes constant, and the surface renewal effect of the liquid is reduced.
If the liquid to be treated has a relatively low viscosity, control the rotation of
This is stirring g4a.

4b is periodically stopped as shown in the pattern shown in FIG. 4, the liquid to be treated falls due to its own weight, stays inside the rod-shaped rectangular frames 3a and 3b, and rotates together, as shown in FIG. The liquid moves toward the wall of the container body 1, exposing the internal liquid and renewing the liquid surface.

In addition, when the liquid to be treated has a relatively high viscosity, the stirring blade 4a
, 4b as in the pattern shown in FIG.

By periodically stopping and then reversing the rotation, the surface shape of the liquid to be treated becomes complex as shown in Fig. 8, and the liquid in the center of the container body l is drawn out toward the wall of the container body l. The fluid is replaced by the new action. That is,
By rotating the stirring wheels g4a and 4b in the opposite direction, the surface renewal action of the liquid is promoted. Furthermore, when the stirring g4a, 4b is temporarily stopped, the two stirring g4a, 4b alternately,
The control bag a! By controlling the stop position with 11, it is possible to increase the amount of liquid that falls from the bar-shaped rectangular frames 3a, 3b due to the weight of the liquid.

By performing the above-mentioned continuous processing, the conventional problems of liquid adhesion to the rotating shaft surface and plate-shaped stirring blade surface can be avoided.
It is possible to do most of the co-rotation.

According to the present invention, when performing condensation polymerization of polyethylene terephthalate, polycarbonate, etc., the viscosity of the processed material increases by several thousand to tens of thousands of poise due to the polymerization reaction, but it can be maintained by sufficient stirring action. The space can be almost eliminated, and furthermore, a good surface renewal effect can be obtained and a high quality polymer can be obtained.

〔Effect of the invention〕

According to the present invention, it is possible to reduce the tread space within the container body, and to prevent the high viscosity liquid to be treated from adhering to the surface of the stirring blades and rotating together, resulting in quality improvement due to scaling, etc. Deterioration can be prevented and high-viscosity substances of good quality can be obtained continuously.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional plan view of a high viscosity substance continuous processing apparatus showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line II-If in Fig. 1, and Fig. 3 is a 1-1 in Fig. 1. The sectional views, Figures 4 and 5 are line diagrams showing the rotation pattern of the stirring blades, Figures fA6 to 8.
The figure is an explanatory view showing the cross-sectional shape of the liquid to be treated when the stirring blade is rotating, stopping, and rotating in reverse. l...Cylindrical container body, 2a, 2b...
Rotating ear shaft, 3a, 3b... Rod-shaped rectangular frame, 4a,
4b... Stirring blade, 5... Bearing, 6...
...Inlet nozzle, 7.8...Outlet nozzle,
9...Driving force transmission device, 10...Driving force 2 Figure 44 Figure time Leap time Figure 46 Figure 47

Claims (1)

[Claims] 1. Two rotary ear shafts are arranged in parallel at both ends in the longitudinal direction in a cylindrical container installed horizontally, and a plurality of rod-shaped rectangular frames are arranged between the rotary ear shafts in the longitudinal direction. A continuous stirring blade is attached, and the rotating ear shafts arranged in parallel are held so that the tip of the bar-shaped rectangular frame of one of the corresponding stirring blades passes close to the center of rotation of the other stirring blade, and the stirring blade is used. 1. A method for continuous treatment of a highly viscous substance, characterized in that the highly viscous substance is continuously stirred and the agitation blade is periodically stopped to carry out the continuous stirring process. 2. The continuous processing method for highly viscous substances according to claim 1, wherein the stirring blade is temporarily stopped and then rotated in the opposite direction.