JPH0699429A - Continuous processing apparatus for high-viscosity material - Google Patents

Abstract

PURPOSE:To enhance volume efficiency and to facilitate the control of temperature by attaching two drip-shaped agitating blade members to two rotary shafts in a cylindrical container, which is horizontally provided, in the overlapping pattern in the specified direction, providing a one-stage agitating blade, providing a plurality of the agitating blades so as to maintain the minute gap in the longitudinal direction, and controlling the number of revolution. CONSTITUTION:The drip-shaped head parts of agitating blade members 3a and 3b are overlapped at the phase of 180 deg. at one of two rotary shafts 2, and one set of the agitating blades is obtained. Agitating blade members 3c and 3d are similarly attached to the other shaft 2, and one set of the agitating blades is obtained. A one-stage agitating blade is constituted of two sets of the agitating blades. The gap between the inner surface of a container 1 and the blades is made minute. The agitating blades of both sets are attached at the same (or 90 deg.) phase, and the agitating blade members 3a and 3d and 3b and 3c are made to pass each other at the minute gap. The next-stage agitaiting blade is attached at the position, which is deviated from the attaching position of the previous-stage agitating blade at a specified angle. The number of revolution is controlled in response to the temperature change in the container 1. An agitating blade, whose shearing action is weak, can be attached between the agitating blade' of a plurality of the stages.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for agitating substances in various states such as high-viscosity fluid, slurry-like substances and powders.

[0002]

2. Description of the Related Art As a conventional apparatus, for example, an extruder is used for polymer modification and polymer synthesis, as described in the literature (Plastic Vol. 41 No. 7, p. 39). Extruders are suitable for high-viscosity processing, but generally cannot hold the residence time necessary for the polymerization reaction when synthesizing a polymer that requires a reaction time because the residence time is short. ,
There is a problem that the surface renewal performance is poor when a by-product is produced with a reaction when a new polymer is produced.
In addition, there is a method of increasing the axial length of the extruder in order to lengthen the residence time, but it is difficult to satisfy the residence time required for the reaction due to restrictions on the structure of the apparatus.
Therefore, in order to secure the residence time necessary for the reaction, a plurality of extruders are connected in series to secure the residence time. With such a configuration, there is a problem that the installation space of the device becomes large and the price of the device becomes expensive. Further, in the extruder, a high shearing force is applied to the screw portion, so that the temperature of the treatment liquid rises rapidly, and it is difficult to maintain an appropriate reaction temperature.

[0003]

In the above-mentioned prior art, since the liquid to be treated is held and stirred in the groove portion of the screw of the extruder, the amount of the liquid held is small, the volumetric efficiency is poor, and the control of the reaction temperature is difficult. There was a problem of difficulty. The purpose of the present invention is to
It is an object of the present invention to provide a continuous treatment device for high-viscosity substances, in which the amount of the high-viscosity liquid to be treated is increased, the volumetric efficiency is increased, and the temperature inside the tank can be easily controlled.

[0004]

[Means for Solving the Problems] The above-mentioned object is to increase the volumetric efficiency by constructing a stirring blade with a drop-shaped thick plate-shaped stirring blade member having a smaller volume than the internal volume of the container, and to further change the shear rate. Or by providing a stirring section having a weak shearing action in the tank.

[0005]

By configuring the stirring blade with a drop-shaped thick plate-shaped stirring blade member having a smaller volume than the internal volume of the container, the liquid to be treated is distributed between the inner wall surface of the container and the stirring blade member and a minute gap. By intersecting blade members, high shearing force can be given in a wide range and optimum stirring performance for polymer production can be obtained,
Further, the rotation speed of the stirring blade is controlled to suppress the temperature rise due to the heat of stirring. Further, a stirring section having a weak shearing action is provided in the apparatus to suppress a rapid temperature rise of the processing liquid.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a horizontally elongated main body container, the outer periphery of which is covered with a heating means (not shown) such as a heat medium jacket, and two rotary shafts 2 penetrate the main body container 1 in the longitudinal direction of the inside. To do. A drop-shaped stirring blade member 3 is attached to each of these rotating shafts so as to penetrate through the plane of the blade member. In the lower part of one end of the main container 1 (on the left side of FIG. 1), a nozzle 10 for the inlet of the processing liquid, at the lower end of the other end, an outlet nozzle 11 for the liquid to be treated, and at the upper part of the container 1, an outlet nozzle 12 for volatile matter. Is provided. A screw 13 for extracting the processing liquid is provided inside the outlet nozzle 11. Figure 2
FIG. 3 is a transverse sectional view of the main body container 1. In FIG. 2, stirring blade members 3a and 3b are attached to the rotary shaft 2, and the stirring blade members 3a and 3b form a pair of stirring blades by overlapping the head portions of the drop shape at a phase of 180 degrees. . In addition, also on the other shaft, a stirrer-shaped head portion is provided by the stirring blade members 3c and 3d.
To form a set of stirring blades, and a pair of stirring blades provided on one shaft to form a single-stage stirring blade.In this case, one stirring blade and the other stirring blade are used. Install the stirring blades in the same phase. At this time, among the one-stage stirring blades, the droplet-shaped stirring blade members 3a and 3c and 3b and 3d are in the same rotation plane and do not intersect with each other. However, 3a and 3d and 3b and 3c have a structure in which they pass each other with a minute gap between the rotating shafts 2. With a single-stage stirring blade, the stirring blade members pass each other twice while the shaft makes one rotation. The stirring blade of the next stage has a predetermined angle (9 in this embodiment) from the mounting position of the stirring blade of the preceding stage.
(The case of 0 degree is shown.) The stirrer blades are mounted so that they are offset from each other, and the following stages are similarly mounted to form a stirring blade. FIG. 3 is a graph showing the method of operating the device of the present invention. FIG. 4 is a diagram showing the overall configuration of the present invention. Reference numeral 15 is a gear box for transmitting power to a biaxial stirring blade, 16 is a drive source of a stirring device, and 17
Is a control device that controls the rotation speed of the drive device, and 18 is a sensor that detects a temperature change in the device, and the signal is sent to the control device 17
Tell to.

In the apparatus having the above structure, the inlet nozzle 1
The treatment liquid continuously supplied from 0 is agitated by the agitating blade member to be subjected to a treatment such as a polymerization reaction and becomes a highly viscous liquid. By-products produced in this process are discharged from the system by the volatile matter removal nozzle 12. When performing operations such as polymer alloys and polymer blends using this apparatus, the inlet nozzle 10
Several kinds of polymers, additives, compatibilizers and other substances supplied from the above are agitated and mixed by the agitating blade member, but since the agitating blade rotates at high speed, it intersects with the container body at the agitating blade and a slight gap. It receives a strong shearing action between the stirring blade members.
Since the stirring blade used in the conventional polycondensation system reaction was mainly based on the mixing performance of the processing liquid, the number of stages of stirring blades installed in the axial longitudinal direction was relatively small, and it was possible to give a wide shearing force to the processing liquid. could not. If a stirring blade is installed at a high density in the longitudinal direction of the shaft as in this apparatus, a sufficient shearing action can be given to the treatment liquid, and it is in an optimum state for operations such as polymer alloy and polymer blend. Further, since there is only one pair of thick-walled stirring blade members in the cross-section of the shaft, the area of the stirring blade occupying the entire cross-section of the container is small and the by-product removal performance from the processing liquid is improved. Further, since the volumetric efficiency of the container is good, there is an advantage that the amount of processing liquid is increased and the residence time of the device can be easily extended. Further, since one set of stirring blades scrapes the wall surface of the container and the shaft surface of the other by one rotation, complete self-cleaning is performed, and there is an advantage that the quality of the product can be prevented from deteriorating.

Further, as shown in FIG. 3, the present apparatus is operated at high speed rotation N ₂ and low speed rotation N ₁ and at operation cycles T ₂ and T ₁ , respectively, so that the stirring generated during the operation at high speed rotation is performed. By operating the heat at a low speed, the amount of stirring heat generated as a whole is suppressed, so that a rapid temperature rise in the device can be suppressed. The operating cycles T ₂ and T ₁ at this time are determined by the controller 17 while the temperature sensor 18 detects the temperature change in the tank.

Next, another embodiment of the present invention will be described with reference to FIG. In this embodiment shown in FIG. 5, a stirring blade having a smaller shearing action than the front and rear stirring blades is attached to the intermediate portion of the apparatus of the embodiment shown in FIG. 1. In this embodiment, a scraping member is attached. A disk-shaped stirring blade 19 is incorporated. The disc-type stirring blade is a stirring blade that does not exert a large shearing action on the treatment liquid, but has excellent surface renewal performance, and liquid that has undergone a strong shearing action on the upstream side undergoes a surface renewal action at this part and reacts. , The temperature rise of the liquid is suppressed due to the loose shearing action. Further, since the stirring blade in this portion has a large hold-up and a good heat transfer efficiency with the wall surface of the apparatus, there is an advantage that the cooling effect of the processing liquid becomes large.

Next, another embodiment of the present invention will be described with reference to FIG. The present embodiment shown in FIG. 6 is an example in which a rod-shaped stirring member 20 is provided in the middle portion of the apparatus of the embodiment shown in FIG.
In the case of this embodiment, the heat transfer performance of the treatment liquid is mainly improved by the stirring action of the rod-shaped member. With this configuration, the temperature of the processing liquid can be prevented from rising by positively removing the heat of stirring generated on the upstream side at this intermediate portion.
Further, the partition 21 in the intermediate portion of the apparatus shown in FIGS. 5 and 6 may be installed on both sides or on either the front stage or the rear stage, or may not be attached, as required. Further, in this embodiment, a stirring section having a weak shearing action is provided in the middle part of the apparatus,
Depending on the operating conditions, it may be provided only on the upstream side or the downstream side of the device.

[0011]

According to the present invention, a pair of thick-walled stirring blade members having a drop shape are overlapped at a phase of 180 degrees to form a set of stirring blades, and these stirring blades are combined in multiple stages. However, the minute gaps between the stirring blade members give a wide and strong shearing action to the treatment liquid, while controlling the shearing strength by the rotation speed and the stirring blades of other shapes to suppress the temperature rise due to heat generation. There is an advantage that the residence time can be easily secured and a high quality product can be produced.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a continuous processing apparatus for highly viscous substances according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory diagram of an operation pattern of the stirring blade of the present invention.

FIG. 4 is an overall configuration diagram of the present invention.

FIG. 5 is a schematic view of a continuous treatment device for highly viscous substances according to another embodiment of the present invention.

FIG. 6 is a schematic view of a continuous processing apparatus for highly viscous substances according to another embodiment of the present invention.

[Description of Reference Signs] 1 ... Main body, 2 ... Rotating shaft, 3a, 3b, 3c, 3d ... Stirring blade member, 4a, 4b, 4c, 4d ... Stirring blade member, 10 ...
Inlet nozzle, 11 ... Outlet nozzle, 12 ... Volatile substance outlet nozzle, 13 ... Extraction screw, 15 ... Gear box, 16 ... Drive source 17 ... Control device, 18 ... Temperature sensor, 19 ... Stirring blade with scraping plate, 20 ... Stirring blades, 21 ... Partitioner.

Front Page Continuation (72) Inventor Kazuo Ihara 794, Higashitoyo, Higamatsu, Shimomatsu, Yamaguchi Prefecture Inside the Kasado Plant, Hitachi, Ltd. Kasado Factory

Claims (3)

[Claims] 1. A substantially cylindrical container placed horizontally is provided with two shafts parallel to the longitudinal direction, and multi-stage stirring blade members are provided on these shafts, respectively, and the outer peripheral end of the stirring blade member is a container. A continuous processing device for highly viscous substances, which is configured to rotate with a minute gap between it and the inner peripheral surface and further maintain a minute gap with each other on the shaft outer peripheral surface. Is provided with blades forming a stirring blade by stacking the stirring blade members of 1. in a multi-stage manner, and two stirring blade members are shifted by 180 degrees on one shaft to form one set of stirring blades, and the stirring blades have a predetermined phase. A plurality of stages are installed in the axial direction with an angle, and one set of stirring blades formed by shifting two stirring blade members on the other shaft by 180 degrees is attached to one shaft at 0 degrees or A single-stage stirring blade configured to have a phase angle of 90 degrees is provided, and the stirring blade is provided with a minute gap in the axial longitudinal direction. What multiple stages is placed, the continuous processing apparatus of a high viscous substance which is characterized by being configured to control while in changing the rotational speed of the stirring blade of the stirring blade driving device of the apparatus. 2. The continuous processing apparatus for a highly viscous substance according to claim 1, wherein the rotation speed control of the stirring blade controls the rotation speed of the stirring blade according to a temperature change in the tank. 3. A horizontally installed substantially cylindrical container is provided with two shafts parallel to the longitudinal direction, and multi-stage stirring blade members are respectively provided on these shafts, and the outer peripheral end of the stirring blade member is a container. A continuous processing device for highly viscous substances, which is configured to rotate with a minute gap between it and the inner peripheral surface and further maintain a minute gap with each other on the shaft outer peripheral surface. Is provided with blades forming a stirring blade by stacking the stirring blade members of 1. in a multi-stage manner, and two stirring blade members are shifted by 180 degrees on one shaft to form one set of stirring blades, and the stirring blades have a predetermined phase. A plurality of stages are installed in the axial direction with an angle, and one set of stirring blades formed by shifting two stirring blade members on the other shaft by 180 degrees is attached to one shaft at 0 degrees or A single-stage stirring blade configured to have a phase angle of 90 degrees is provided, and the stirring blade is provided with a minute gap in the axial longitudinal direction. What multiple stages is placed, the continuous processing apparatus of a high viscous substance, characterized in that to constitute a device fitted with a weak stirring blade of shearing from stirring blade back and forth in the axial longitudinal section of the device.