JPH05320357A - Method for stirring viscous substance and stirring apparatus - Google Patents

Abstract

PURPOSE:To provide a stirring apparatus capable of mixing a treating liquid having a viscosity of up to about 5 kPa. s at a shearing rate of about 1,000/s or below and a resident time of about 0.5-2.0h. CONSTITUTION:A container 10 is provided with a pair of parallel shafts 11a,11b each having a blade 12a,12b perpendicular to the shaft and the adjacent blades of the shafts are crossed with each other. The shearing area can be widened by this structure to enable the application of stirring, mixing and shearing forces in a short time. The shearing rate can be increased by reducing the clearance between the blades and increasing the rotational speed. Since the stirring blades 12a,12b have non-circular form, the retention volume can be increased to prolong the retention time by holding the treating liquid in a space free from the blades.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirring treatment apparatus suitable for continuously producing high molecular weight resins, engineering plastics, etc. by applying strong shearing force to a highly viscous substance and stirring and mixing it.

[0002]

2. Description of the Related Art In recent years, plastic materials such as polymer resins and engineering plastics have been developed to meet various requirements. Therefore, the manufacturing methods of these materials are also diversified. For example, in order to obtain a material having high impact resistance, a viscosity increasing additive is added to the treatment liquid in the final step of the reaction. At this time, this highly viscous liquid must be stirred to accelerate the reaction. Therefore, in order to increase the kneading force, it is necessary to give a high shear rate to the stirring treatment device.

On the other hand, in order to obtain a material having multiple functions such as insulation resistance and chemical resistance, an existing polymer resin is redissolved, an additive is added to the treatment liquid, and then a different polymer is added. React. Alternatively, existing polymer chains are cleaved to incorporate heterologous molecules. Therefore, the stirring treatment device
Along with the functions of stirring a high viscosity liquid and imparting a high shear rate, the function of prolonging the residence time necessary for the reaction is required.

An example of this type of conventional stirring treatment apparatus is disclosed in Japanese Patent Laid-Open No. 62-112624. In this conventional apparatus, the processed product is put into the container through the processed product inlet nozzle, the processed product is continuously stirred by a pair of stirring blades attached to a pair of rotating shafts, and the processed product is discharged from the processed product outlet nozzle. The gap between the inner wall of the container and the stirring blade is small,
Moreover, the structure is such that the space volume in the container can be increased to prolong the residence time.

Another conventional device is "plastics".
(Published by the Industrial Research Council) Vol. 39. No. 5 are listed. In this apparatus, the processed product is introduced into the cylinder through the processed product introduction port and continuously processed by the screw while being heated by the heater. In this device, the shearing surface is provided on the entire surface of the cylinder, and the shearing speed is increased by increasing the rotation speed.

As an example of a similar stirring treatment device, "Chemical device" (published by the Industrial Research Institute), June 1992, P77-P8
The extruder of screw type described in 1 may be used.

Alternatively, there is also known a rotor-type agitator having spectacle frame-shaped blades as disclosed in Japanese Patent Publication No. 50-21514.

[0008]

SUMMARY OF THE INVENTION The stirring device first mentioned as the above-mentioned prior art has a problem that the kneading force is insufficient because the shearing surface is small and the shearing speed is small. That is, the location where the shearing force is applied to the processed material is limited to the inner bottom surface of the container body, and the rotation speed is generally low, so that the shear rate is small. Therefore,
This device is not suitable for agitation of high viscosity materials.

The second and third screw type stirring devices of the prior art described above have a large shearing force. However, no consideration has been given to increasing the amount of the treatment liquid to be applied, and there is a problem that the residence time required for the reaction cannot be long. To ensure the required reaction time, 2
Up to three machines must be installed in series, a large installation area is required, and the cost is high. Further, since the screw is rotated at a high speed, the temperature of the treatment liquid rises due to the heat associated with stirring, which makes it difficult to control the reaction temperature of the treatment product.

Further, in the above-mentioned rotor type agitation processing apparatus, since the space volume inside the container body is large and a large amount of liquid to be processed can be put therein, the residence time can be long. However, the place where the shearing force largely acts is only between the inner wall surface of the container body and the treatment liquid scraping portion, and therefore, it is inefficient to mix two or more high-viscosity substances.

As described above, none of the conventional stirring devices simultaneously satisfy the two requirements that a high-viscosity substance can be sufficiently kneaded and that a long residence time suitable for various reactions is ensured.

An object of the present invention is to eliminate the above-mentioned drawbacks, to provide a stirring treatment apparatus capable of treating a high-viscosity liquid having a high shear rate and capable of keeping a residence time in a container long.

Another object of the present invention is to provide a continuous treatment apparatus for highly viscous substances which increases the amount of the highly viscous liquid to be treated retained, enhances volumetric efficiency, and facilitates temperature control of the reaction.

[0014]

In order to achieve the above object, the present invention provides an agitation treatment apparatus in which a plurality of freely rotating rotary shafts and rotary blades attached to these rotary shafts are provided in a cylindrical container. , Each of a plurality of parallel rotary shafts in the container is provided with a rotary blade extending in a direction perpendicular to the axis, between the opposing rotary blades on the adjacent rotary shafts and the side surfaces of the rotary blades, and on the outer periphery of each rotary blade and the inner surface of the container. It is characterized by forming a shear field. Further, the rotary blade is composed of a fan-shaped, drop-shaped, or rectangular plate member having a narrow angle of 180 degrees or less to enlarge the space inside the container.

The above-mentioned other object is achieved by making the rotation speed of the rotary blade, that is, the shearing speed variable, or by providing a stirring section having a different shearing action in the container.

[0016]

A wide shear field can be secured and a large shear force can be applied by intersecting the rotary blades on the adjacent rotary shafts. Since the rotary blade has a fan shape or a drop shape with a narrow angle of 180 degrees or less, the space occupied by the rotary blade in the container is reduced. In other words, the space for accommodating the processing liquid becomes large, and a large amount of the processing liquid can be retained. Therefore, it is possible to increase the amount of swelling and increase the residence time. According to the present invention, the shear rate applied to the treatment liquid can be 100 to 1000 / s, and the time for which the treatment liquid is retained in the container can be 0.5 to 2.0 h.

Further, it is possible to suppress a rapid temperature rise of the treatment liquid due to the heat of stirring by changing the number of rotations of the rotary blades or providing a stirring section having a weak shearing action in the apparatus. Furthermore, by notching a part of the rotary blade member, the treatment liquid can be easily made to flow into a minute gap between the rotary blade members, and a shearing force can be applied to a larger amount of the treatment liquid to enhance the kneading force.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the stirring treatment apparatus of the present invention will be described with reference to FIGS. In the figure, reference numeral 10 indicates a cylindrical container, and at the lower part of the cylindrical container 10, a processed material inlet nozzle 1
4. A processed material outlet nozzle 15 is provided, and a volatile matter outlet nozzle 16 is provided on the upper portion. Inside the cylindrical container 10, two rotary shafts 11a and 11b are rotatably supported in parallel by bearings 13a and 13b, respectively. The rotating shafts 11a and 11b have fan-shaped rotor blades 12a (12a1 to 12a6) and 12b (12), respectively.
b1 to 12b6) are arranged in the longitudinal direction at right angles to the rotary shafts 11a and 11b with a predetermined interval. Adjacent rotor blades 12a and 12b are provided with a phase difference of 180 °. On the inner surface of the cylindrical container 10, a plurality of fan-shaped fixed blades 18a (18a1 to 18a) are provided.
6) and 18b (18b1 to 18b6) are adjacent to each other
It is provided with a predetermined distance d between 2a and 12b.

As is apparent from FIG. 2, the longitudinal section of the cylindrical container 10 is a combination of two semi-circular arcs whose upper part is one semi-circular arc and whose lower part is the axes 11a and 11b. The whole shape is almost heart-shaped.

The inner wall surface of the cylindrical container 10 and the rotor blades 12a, 1
There is a constant clearance C between the 2b, which makes it possible to obtain a field (first shear field) on which a shearing force acts.

The rotor blades 12a1 and 12b1 face each other with a narrow gap D therebetween, and a field (second
Shear field). Rotor 12a
Similar shear fields are formed between 2 to 12a6 and the rotor blades 12b2 to 12b6.

The fixed wing 18a1 and the rotating body 12a1 face each other through a narrow gap d, and have a structure in which a field (third shear field) on which a shearing force acts is formed. Fixed wing 18a2
Fields in which similar shearing forces act are also formed between 18a6 and the rotating bodies 12a2 to 12a6.

In the apparatus as described above, the treatment liquid is introduced from the treatment product inlet nozzle 14 and the rotary shafts 11a, 11
Send to near the center of b. As the rotary shafts 11a and 11b are driven by the drive device, the treatment liquid is discharged between the rotary blades 12a and 12b and the inner wall of the cylindrical container 10 (first shearing field), and the rotary blades 12a and 12b (first blade). 2 shear fields),
Alternatively, the rotary blades 12a, 12b and the fixed blades 18a, 18b
While being subjected to a shearing force in the interval (third shearing field), the mixture is agitated and mixed and heads for the processed product outlet nozzle 15. Now the rotation axis is 11
When a and b rotate in the same direction, the outer periphery of the rotary blade 12a periodically intersects with the inner wall surface of the container, and the side surface of the rotary blade 12a periodically intersects the side surface of the fixed blade 18a and the side surface of the mating rotary blade 12b. , Sequentially forming shear planes. During this time, the volatile matter generated by the reaction is discharged from the volatile matter outlet nozzle 16.

Here, the rotational angular velocity ω of the rotating shaft, the radius r of the rotating blade, the clearance C between the outer periphery of the rotating blade and the inner wall surface of the container, the distance between the rotating shafts 11a and 11b is L, and the intersection of the rotating blades 12a and 12b. The axial gap at the time point is D, and the rotary blade and the fixed blade 18a
Alternatively, assuming that the axial distance at the time of intersection with 18b is d, the shear rate V is expressed as follows.

In the first shear field between the outer periphery of the rotor blade and the inner wall surface of the container, V1 = rω / C (1) In the second shear field between the opposing rotor blade and the rotor blade, both rotations are performed. On the line connecting the axes of the shafts, V2 = L · ω / D (2) At the third shear field between the rotor blade and the fixed blade, V3 = r · ω / d (3) where r is Indicates an arbitrary distance in the radial direction.

The treatment liquid enters the container 10 through the inlet nozzle 14 and is kneaded by the rotary blades at three types of shear rates V1 to V3 represented by the formulas (1) to (3), respectively, and is kneaded. 15 is discharged to the outside. Rotor 12a,
The inclined portions 17a and 17b having an angle α provided on the end surface of 12b produce an effect of pushing the processing liquid in the axial direction. Angle α is 4
About 5 degrees is desirable.

The gaps C, D, d in the portions forming each shear field
Is preferably 5 mm or less. Higher shear rates can be created by keeping these gaps as small as possible and increasing the speed of rotation.

Next, in order to secure the retention time of the processing liquid in the container 10, the rotary blades 12a, 12b and the fixed blades 18a, 18b in the container 10 are provided with voids. That is, the rotary blades 12a and 12b and the fixed blades 18a and 18b are fan-shaped rather than perfect disk-shaped. The narrow angle θ of the wing is 18
It is desirable to set it to 0 degrees or less. This can increase the void space in the container. The treatment liquid can be retained for a long time between voids in the container or between the rotary blades, and a predetermined residence time can be secured.

As a processing liquid for carrying out a reaction using the apparatus of the present invention, there is, for example, a silicone resin, and a viscosity of 130
The reaction is carried out at 0 Pa · s, a shear rate of 100 / s and a residence time of 1 h. In the case of PET resin, the viscosity is 10
00Pa · s, shear rate 100 / s, residence time 1.5h
The reaction is going on. In addition, the PET resin has a viscosity of 1000 Pa · s, a shear rate of 56 / s, and a residence time of 1 to
In some cases, the reaction is carried out in 1.7 hours. In order to process various engineering plastics as described above,
It is considered necessary that the agitation treatment device satisfies the conditions of a maximum viscosity of 5 kPa · s, a maximum shear rate of 1000 / s, and a residence time of 0.5 to 2.0 h.

The effect of the present invention will be described with reference to FIG. Figure 3
, The vertical axis is the shear rate axis 1, the horizontal axis is the residence time axis 2,
The viscosity axis 3 is taken in the direction perpendicular to the paper surface, and the respective units are (1 / s), (h), and (kPa · s). In order to obtain a material having high impact resistance, in the final step of the reaction, it is necessary to add an additive for increasing the viscosity to the treatment liquid to accelerate the reaction. In this step, stirring of the highly viscous liquid and a high shear rate are required, so it is necessary to increase the kneading force of the stirring device. In the conventional stirring device, as shown in FIG. 3A, even if a treatment liquid having a high viscosity of 5 kPa · s can be stirred, the kneading force is insufficient because the shear rate is low.

In order to obtain a material having multiple functions such as insulation resistance and chemical resistance, an existing polymer resin is redissolved, a different polymer is added, and then an arbitrary additive is added. React or cleave existing polymer chains to incorporate heterologous molecules. In order to perform such processing, the stirring device is
It is required to agitate the high-viscosity liquid, impart a high shear rate, and prolong the residence time necessary for the reaction. The conventional stirring device has a high viscosity of 5 kPa.
s and a shear rate of 1000 / s at maximum, the residence time required for the reaction was as short as 0.2 h, which was unsatisfactory. As described above, the conventional stirring device is shown in FIG.
Alternatively, only one of the conditions of (B) was satisfied.

On the other hand, according to the stirrer of the present invention, the shear rate is about 1000 / s to 100 / s and the viscosity of the target treatment liquid is 5 k.
It can be processed at a Pa · s or less and a residence time of 0.2 to 2.0 h. That is, the stirring device of the present invention has a structure shown in FIG.
All areas of (B) and (C) can be covered.

For example, in the embodiment of FIG. 1, C = 2
(Mm), r = 130 (mm), rotation speed N = 147 (r
pm), the shear rate V1 = 1 according to the equation (1).
000 (1 / s) is obtained.

Similarly, when L = 150 mm and D = 2 mm, the shear velocity V2 =
It becomes 1154 (1 / s). Further, assuming that d = 2 mm, the shear rate V3 of the peripheral portion of the rotor is V3 = 10 according to the equation (3).
It becomes 00 (1 / s).

Thus, a large shearing force can be obtained in a wide area. Regarding the residence time determined by the space inside the cylindrical container 10 and the liquid feed amount, the residence time can be shortened by reducing the volume of the space and lengthened by increasing the volume. it can.

By reducing the size of the narrow angle θ of the rotary blade, the voids in the container increase, so that the amount of the processing liquid can be increased and a continuous processing apparatus having a long residence time can be provided. This narrow angle θ is made as small as possible, and at the same time, the shape of the rotor blade has the shear strength required for the rotor blade. A drop-shaped plate-shaped rotor blade that tapers toward is conceivable.

As an example of such a rotating body, an embodiment using a drop-shaped rotary blade will be described with reference to FIGS. In the figure, 30 indicates a cylindrical container, and the lower part of this cylindrical container 30 is
A processed material inlet nozzle 36, a processed material outlet nozzle 37, and a volatile material outlet nozzle 38 are provided on the upper portion. Two rotating shafts 35a and 35b are rotatably supported inside the cylindrical container 30 by bearings. Rotating shaft 3
5a and 35b respectively have drop-shaped (or leaf-shaped) plate-shaped rotor blades (31a, 31b, 32a, 32b, 33a,
33b, 34a, 34b) has a longitudinal axis of rotation 35a,
35b is provided vertically and in multiple stages. The drop-shaped plate-shaped rotating body is composed of a pair of parabolas extending in a drop shape or a leaf shape from the semicircular arc-shaped shaft portion to the outside in the radial direction. It can be considered that such a drop-shaped rotating body has a narrow angle θ (in other words, the length of the arc portion at the tip) of the fan-shaped rotating body having the radius r of substantially zero. The shaft portion and the tip portion are connected by a pair of parabola in order to secure the shearing force. As an example, the length (radius) of the rotary blade r = 130 mm, the radius of the shaft portion R = 30 mm
It is good to say

The phases of the respective rotary blades are the same in the pair of rotary blades 31a and 31b in the same stage. The rotor blades 32a, 32b in the next stage have a phase difference of 180 ° with respect to the rotor blades 31a, 31b. Further, the pair of rotary blades 33a, 33b in the third stage has a phase difference of 90 ° with respect to the rotary blades 32a, 32b in the second stage. Similarly, a pair of rotating blades 34a, 34b in the fourth stage has a phase difference of 180 ° with respect to the rotating blades 33a, 33b in the third stage.

The inner surface of the cylindrical container 30 and each rotor (31a,
31b, 32a, 32b, 33a, 33b, 34a, 3
A field (first shear field) on which a shearing force acts is obtained by the tip surface of 4b). In addition, when a shearing force acts between the side surfaces of the pair of rotor blades (rotor blade 31a and rotor blade 32b, rotor blade 31b and rotor blade 32a, rotor blade 33a and rotor blade 34b, rotor blade 33b and rotor blade 34a). A (second shear field) is obtained.

For example, the inner surface of the cylindrical container 30 and the rotating body 31
The gap between the tips of a and 32b is C (mm), the rotation shaft 35a,
The rotation speed of 35b is N (rpm), the rotation shafts 12a, 12b
The distance between the center of the rotor and the tips of the rotor blades 35a and 35b is r (m
m), C = 2 (mm), r = 130 (mm), N
= 147 (rpm), it becomes possible to obtain the shear rate V1 = 1000 (1 / s) from the above equation (1). Regarding the residence time determined by the space inside the cylindrical container 30 and the liquid feed amount, the residence time can be shortened by reducing the volume of the space and can be extended by increasing the volume. ..

Next, FIG. 6 shows another embodiment of the present invention. In this embodiment, the same constituent elements as the rotary blades described in FIG. 4 are used, and the mounting angle between the pair of rotary blades is 90 degrees. The stirring blade member 45 is attached to the rotary shaft 42a in the container 40.
a, 45b, 46a, 46b are attached. The stirring blade members 45a, 45b and 46a, 46b form a pair of rotary blades (first rotary blades) by superimposing drop-shaped head portions at a phase of 180 degrees. Further, also on the other shaft 42b, a pair of rotor blades (second rotor blades) are configured by combining the portions of the head of the drop shape with the stirring blade members 45c, 45d, 46a, 46b at a phase of 180 degrees. This and the first rotary blade provided on the one shaft form a single-stage rotary blade. In the case of this embodiment, the rotary blade of the one shaft 42a and the stirring blade of the other shaft 42b are further attached with a phase of 90 degrees.
At this time, the drop-shaped stirring blade members 45a and 45c and 45b and 45d of the one-stage stirring blade are in the same rotation plane and do not intersect with each other. However, 45d and 46a rotating shaft 42a,
It becomes the structure which passes each other with a minute interval between 42b. At this time, with the three-stage rotating blades, the stirring blade members pass each other twice while the shaft makes one rotation. In this case, the mounting angle between the steps is 90 degrees.

In the apparatus having the above construction, the inlet nozzle 47
The treatment liquid more continuously supplied is the stirring blade members 45, 46.
The mixture is agitated and subjected to a treatment such as a polymerization reaction to obtain a highly viscous liquid. By-products produced in this process are discharged to the outside of the system by a volatile matter removal nozzle. When a polymer alloy, a polymer blend, or the like is operated using this apparatus, several kinds of polymers, additives, compatibilizers, and other substances supplied from the inlet nozzle 47 are stirred and mixed by the stirring blade members 45 and 46. , The stirring blade is rotating at high speed, so the container body 40
Shear is strongly sheared between the rotor and the rotor and between the rotors that make a pair.

When the rotor blades are installed at a high density in the longitudinal direction of the shaft as described above, a sufficient shearing action can be given to the treatment liquid, which is in an optimum state for operations such as polymer alloy and polymer blend. Further, in the container, there is only one pair of thick-walled stirring blade members in the cross-section of the shaft, and the area of the stirring blade occupying the entire cross-section of the container is small. Performance improves. Further, since the volumetric efficiency of the container is good, there is an advantage that the amount of the processing liquid increases and the retention time of the processing liquid in the apparatus can be easily lengthened. Further, since one set of stirring blades scrapes the wall surface of the container and the surface of the other shaft with one rotation, complete self-cleaning is performed, and there is an advantage that deterioration of the quality of the product can be prevented.

Next, another embodiment of the present invention will be described with reference to FIG. The stirring blades 48 (a, b), 49 (a, of this embodiment
In b), the outer peripheral end of the drop-shaped stirring blade member is retracted in the direction opposite to the rotation direction. With such a structure, the processing liquid can be better caught and the shearing effect can be improved efficiently. There is.

According to each of the embodiments described above, a pair of thick-walled stirring blade members having a drop shape are overlapped with a phase difference of 90 degrees or 180 degrees to form a set of rotary blades, and these are combined in multiple stages. Constitutes a rotary wing. As a result, the treatment liquid has a wide and strong shearing action, and at the same time, the residence time required in the apparatus can be secured, and a high quality product can be produced.

Another embodiment of the present invention will be described with reference to FIG. This embodiment is a modification of the embodiment shown in FIGS. That is, in FIG. 8, the stirring blade members 31a and 32a are attached to the rotary shaft 35a,
The stirring blade members 31a, 32a are provided with a drop-shaped head portion of 180
A pair of agitating blades are formed by superimposing them on each other in the phase of degrees. or,
Also on the other shaft, the stirring blade members 31b and 32b are combined to form a pair of stirring blades with a drop-shaped head portion at a phase of 180 degrees, and one pair of stirring blades is provided on one shaft to form a single stage. In this case, the stirring blade of one shaft and the stirring blade of the other shaft are attached in the same phase.

At this time, the amount of the gap D between the stirring blade members 31 and 32 of each stage is different between the side of the treatment liquid inlet nozzle 36 and the side of the outlet nozzle 37. That is, the stirring blade member 31,
The magnitude of the shearing force between 32 is adjusted by the value of the gap D between the blade members. In this embodiment, the gap amount D1 on the inlet side is set small, and the gap amount D2 on the outlet side is set large. On the inlet side of the apparatus, the treatment liquid has just started the reaction and blending operations, so it is preferable to set the gap D1 small in order to quickly reach the reaction and blending conditions.
On the other hand, on the outlet side of the apparatus, since the processing liquid after the desired operation is in the adjustment stage, it is preferable to increase the gap D2 to reduce heat generation due to the shearing action and prevent thermal deterioration of the processing liquid.

In this embodiment, an example in which the gap is made small on the inlet side and made large on the outlet side has been described, but the setting of the gap D between the stirring blade members may be adjusted depending on the purpose of the reaction operation. For example, in order to give a strong shearing action to the treatment liquid and suppress the heat generation of the treatment liquid, the size of the blade gap is set alternately to a small setting and a large setting so that the strong shearing action is not continuous. It is also possible to Furthermore, if a device that can automatically adjust the size of the blade gap during rotation is attached to this stirring device, ideal shear strength can be selected according to the reaction operation conditions, and high quality polymer can be produced. You can

Another embodiment of the present invention will be described with reference to FIGS. FIG. 9 shows the overall configuration of the
Is a stirring device as shown in FIGS. 4 and 5, 50 is a gear box for transmitting power to biaxial stirring blades, 51 is a drive source for the rotating shaft of the stirring device, and 52 is control for controlling the rotation speed of the driving device. The device 53 is a sensor for detecting a temperature change in the device and transmits the signal to the control device 52.

FIG. 10 is a graph showing the operating characteristics of the device shown in FIG. This device has a high speed rotation N ₂ and a low speed rotation N ₁
Is operated in accordance with the pattern 55 which is repeated in each of the operation cycles T ₂ and T ₁ . By operating the stirring heat generated during the operation at the high speed rotation at the low speed rotation, the amount of the stirring heat generated as a whole can be suppressed. Thereby, a rapid temperature rise in the device 30 can be suppressed. At this time, based on the temperature change in the tank detected by the temperature sensor 53, the controller 4 maintains the temperature in the tank within a predetermined range.
2, the operating cycles T ₂ and T ₁ are determined.

Next, another embodiment of the present invention will be described with reference to FIG.
Will be explained. In this embodiment, in addition to the apparatus of the embodiment shown in FIGS. 4 to 5, a chamber 61 partitioned by a partition 60 is provided in the middle of the apparatus, and this chamber is sheared by the front and rear stirring blades 31 to 34. A stirring blade 62 having a small size is attached. In this embodiment, a disk-shaped stirring blade 62 with a scraping member is incorporated. The disc-shaped stirring blade 62 is a stirring blade having excellent surface renewal performance, although the shearing action given to the treatment liquid is not so great. Therefore, the upstream stirring blades 31 to 34
The liquid that has been subjected to a strong shearing action at the above portion is subjected to a surface renewal action at this portion and the reaction proceeds, and 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 holdup and a good heat transfer performance with the wall surface of the apparatus, there is an advantage that the cooling effect of the treatment liquid becomes large.

A rod-shaped stirring member may be provided instead of the disc 62 provided in the intermediate portion of the apparatus of the embodiment shown in FIG. In this case, the treatment liquid is radiated by the stirring action of the rod-shaped member. In this way, by positively radiating the heat of stirring generated on the upstream side in this intermediate portion, it is possible to prevent the temperature of the processing liquid from rising. Further, the partition 60 in the middle part of the apparatus may be provided on both sides, or on either the front stage or the rear stage as required, or may not be attached. Further, in this embodiment, a stirring section having a weak shearing action was provided in the middle part of the apparatus, but depending on the operating conditions, a stirring section having a strong shearing action was provided only on the upstream side or the downstream side of the apparatus, and the shearing action was weak. You may make it combine a stirring section.

Next, FIGS. 12 to 14 show details of modified examples of the stirring blade members 32a and 31b in the stirring device of FIG. In a plane where the stirring blade member 32a and the stirring blade member 31b face each other, a straight line extends from a line 70 extending from the drop-shaped head toward the center of the rotation axis to a line 71 in the plane in the rotation direction of the stirring blade member 31b. There is a line 72 that is cut out.
That is, a portion 73 surrounded by these lines 70, 71, 72 is cut out. As a result, the area of the second shear field is halved, and the calorific value is suppressed. Further, since the treatment liquid passes through this cutout portion, the stirring blade members 31b, 3
There is an advantage that the biting between the 2b is improved and the shearing action can be efficiently performed.

Another embodiment of the present invention will be described with reference to FIG. In this embodiment, the rotary blade 80a is a rectangular parallel plate having the same width as the shaft diameter. The structures of the cylindrical container 10, the processed material inlet nozzle 14, the processed material outlet nozzle 15, the volatile material outlet nozzle 16, and the fan-shaped fixed blades 18a and 18b are the same as those described in FIG. Since the liquid to be treated has a low viscosity in the vicinity of the inlet of the object to be treated, the rotors having large shear planes, that is, the fan-shaped rotors 12a and 12a.
b is used. On the other hand, in the vicinity of the processed material outlet, the viscosity of the liquid to be treated is high, so that the rotor having a relatively small shearing surface,
That is, the parallel plate-shaped rotating bodies 80a and 80b are used. By using a combination of different types of rotating bodies having different shearing surfaces in this way, it is possible to apply a shearing force according to the state of the liquid to be treated.

Alternatively, since the viscosity of the liquid to be treated is low near the inlet of the object to be treated, a rotating body having a large shearing surface, for example, a parallel plate-like rotating member 80 as shown in FIG.
a, 80b and fan-shaped rotors 12a, 12b are used. On the other hand, since the viscosity of the treatment liquid is high near the treated material outlet, a rotor with a relatively small shear plane, such as a parallel plate, is used. You may use only the rotating bodies 80a and 80b.

[0056]

EFFECTS OF THE INVENTION According to the present invention, a shear rate of about 1000 / s, which cannot be obtained by a general reactor, can be easily obtained. Therefore, high-viscosity substances such as polymer resins and engineering plastics can be treated. In addition, since it is possible to provide a stirrer with a long residence time, it is possible to reduce the installation area and cost by using only one machine, which would otherwise have to be installed two or three times in a general extruder. it can.

Further, by constructing the stirring blades combined in multiple stages or adjusting the gap amount between the stirring blade members, the shear strength can be controlled and the temperature rise due to heat generation can be suppressed according to the application. Moreover, there is an advantage that a high quality product can be produced.

[Brief description of drawings]

FIG. 1 is a view showing a cross section of a stirring device according to an embodiment of the present invention.

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

FIG. 3 is a diagram showing an effect of the present invention.

FIG. 4 is a view showing a cross section of a stirring device according to another embodiment of the present invention.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is a vertical cross-sectional view of a stirring device according to another embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view of a stirring device according to another embodiment of the present invention.

FIG. 8 is a view showing a cross section of a stirring device according to another embodiment of the present invention.

FIG. 9 is a diagram showing an example of a system for controlling the stirring device of the present invention.

10 is a diagram showing a control pattern in the apparatus of FIG.

FIG. 11 is a view showing a cross section of a stirring device according to another embodiment of the present invention.

FIG. 12 is a plan view showing a modified example of the stirring blade in the stirring device of the present invention.

FIG. 13 is a view of the blade shown in FIG. 12 viewed from a BB direction.

14 is a cross-sectional view taken along line CC of FIG.

FIG. 15 is a vertical cross-sectional view of a stirring device according to another embodiment of the present invention.

FIG. 16 is a vertical cross-sectional view of a stirring device according to another embodiment of the present invention.

[Explanation of symbols]

1 ... Shear rate axis, 2 ... Residence time axis, 3 ... Viscosity axis, 10 ...
Cylindrical containers, 11a, 11b ... Rotating shafts, 12a, 12b ...
Rotating body, 13a, 13b ... Rotating body bearing, 14 ... Treated matter inlet nozzle, 15 ... Treated matter outlet nozzle, 16 ... Volatile matter outlet nozzle, 17a, 17b ... Horizontal stirring section, 18a, 18b
… Fan-shaped plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuo Kimura, No. 502, Jinritsucho, Tsuchiura-shi, Ibaraki Prefecture, Hiritsu Manufacturing Co., Ltd. (72) Chiyo Oda, No. 502, Jinritsucho, Tsuchiura-shi, Ibaraki, Hiritsu Manufacturing Co., Ltd. Inside the Mechanical Research Laboratory (72) Inventor Hidekazu Nakamoto 502 Jinritsucho, Tsuchiura City, Ibaraki Prefecture Hiritsu Mfg. Co., Ltd. Inside the Mechanical Research Laboratory (72) Atsumi Kanzaki 794 Higashitoyoi Higashitoyo, Yamaguchi Prefecture Hitachi Techno Engineering Co., Ltd. In-house

Claims (12)

[Claims] 1. A plurality of rotary shafts arranged in parallel in a cylindrical container having an inlet and an outlet of a processed material, a plurality of rotary blades provided on each rotary shaft, and a drive device for the rotary shaft. In the viscous substance agitator provided with, each of the rotary blades is constituted by a plate-shaped member having a narrow angle of 180 degrees or less, and the two adjacent rotary shafts are radially overlapped with each other in the axial direction. A pair of rotary blades having a narrow gap in each of them are arranged in multiple stages, each has a first shear field between the outer circumference of each rotary blade and the inner wall surface of the container, and An agitator characterized by having a second shear field between each side surface of the rotary blade. 2. The stirring device according to claim 1, wherein each of the rotary blades is formed of a fan-shaped plate member. 3. The stirring device according to claim 1, wherein each of the rotary blades is formed of a drop-shaped plate member. 4. The rotary blades are formed of a fan-shaped plate member near the inlet of the container, and a rectangular flat plate member near the outlet of the container. Stirrer. 5. A plurality of rotary shafts arranged in parallel, a plurality of rotary blades provided on each rotary shaft, and a drive device for the rotary shaft, in a cylindrical container having an inlet and an outlet for the processed material. In a viscous substance agitator provided with, each of the rotary blades is constituted by a plate-shaped member having a narrow angle of 180 degrees or less, and is overlapped with each other in the radial direction on two adjacent rotation axes,
A pair of rotary blades having a narrow gap in the axial direction are arranged in multiple stages, and fan-shaped fixed blades paired with the pair of rotary blades are provided in multiple stages inside the cylindrical container and outside the two adjacent rotary shafts. A first shearing field is provided between an outer circumference of each of the rotary blades and an inner wall surface of the container, and a second shearing field is provided between the pair of rotary blade side surfaces on the adjacent rotary shafts
And a third shear field between the side surface of each of the pair of rotary blades and each of the fan-shaped fixed blades. 6. A plurality of rotating shafts arranged in parallel in a cylindrical container having an inlet and an outlet of a processed material, rotary blades provided on each of these rotating shafts in a plurality of axial stages, and the rotating shaft. In a viscous substance agitating device for agitating a processed material in a container by the rotary blade, two drop-shaped plate members are shifted by 180 degrees to form a set of first rotary blades. , The first rotor blades are arranged in multi-stages on the one rotating shaft so as to sequentially have a constant phase angle, and have a phase angle of 0 degree or 90 degrees with the first rotor blades.
A pair of second rotary blades are arranged, and the second rotary blades are arranged in multiple stages on the other rotary shaft so as to sequentially have a constant phase angle, and the outer circumference of each rotary blade and the inner wall surface of the container And a second shear field between each of the first rotary blade and the second rotary blade in each stage. 7. A cylindrical container having an inlet and an outlet for a processed material, a plurality of rotating shafts arranged in parallel, a plurality of rotating blades provided on each rotating shaft, and a drive device for the rotating shaft. In each of the viscous substance agitating devices, each of the rotating blades is configured by a plate-shaped member having a narrow angle of 180 degrees or less, and a narrow gap is provided between an outer periphery of each of the rotating blades and an inner wall surface of the container. A first shear field is formed on the two adjacent rotating shafts, and a pair of rotating blades radially overlapping with each other and having a narrow axial gap are arranged in multiple stages on the adjacent rotating shafts. A stirrer having a second shear field in which a gap increases from the inlet to the outlet, between the side surfaces of the pair of rotary blades. 8. A plurality of rotating shafts arranged in parallel in a cylindrical container having an inlet and an outlet of a processed material, rotary blades provided on each of these rotating shafts in multi-stages in an axial direction, and the rotating shaft. In a stirring device that includes a shaft driving device and that stirs a processed material in a container by the rotating blades, each of the rotating blades is configured by a plate-shaped member having a narrow angle of 180 degrees or less, A first shear field having a narrow gap is formed between the outer periphery and the inner wall surface of the container, and a pair of adjacent two rotating shafts radially overlap each other and have a narrow axial gap. The rotating blades are arranged in multiple stages, and have a second shearing field with a narrow interval between the side surfaces of the pair of rotating blades on the adjacent rotating shafts. The second shearing field includes the vicinity of the inlet and the outlet. Shearing is strong in the vicinity and weak in the middle. Stirrer which is a structure. 9. A cylindrical container is provided with two parallel rotary shafts, and rotary blades are provided on each of these two rotary shafts in multiple stages, and the outer peripheral ends of the rotary blades form a minute gap with the inner peripheral surface of the container. In a continuous treatment device for high-viscosity substances configured to form a first shear field that rotates while maintaining, a rotary vane is configured by superposing drop-shaped vane members in multiple stages on the two rotary shafts, On one rotary shaft, two drop-shaped blade members are shifted by 180 degrees to form a set of first rotary blades, and the rotary blades are installed in a plurality of stages in the axial direction with a predetermined phase angle. A pair of second rotor blades formed by shifting two drop-shaped blade members on the shaft of 180 degrees are formed so as to have a phase angle of 0 degree or 90 degrees with the first rotor blade attached to the one shaft. A single-stage rotary blade is constructed, and the rotary blade is rotated in the axial direction with a minute gap to form a second shear field. A plurality of stages installed in, first, fourth and between the second rotating blade attached weak third rotating blades of the shearing action from the rotor blade comprised of the teardrop-shaped member
A continuous treatment device for highly viscous substances, characterized in that a shear field is formed. 10. A first and a second forming the second shear field.
10. The continuous processing apparatus for highly viscous substances according to claim 9, wherein a part of the rotary blade of the above is cut out to increase the interval. 11. A cylindrical container having an inlet and an outlet for a processed material, a plurality of rotating shafts arranged in parallel, a plurality of rotating blades provided on each rotating shaft, and a drive device for the rotating shaft. Equipped with
Each of the rotary blades is formed of a plate-shaped member having a narrow angle of 180 degrees or less, and a pair of rotary blades that are radially overlapped with each other on the two adjacent rotary shafts and have a narrow gap in the axial direction. A continuous treatment of high-viscosity substances in a stirring device that is arranged in multiple stages and in which the drive device has means for controlling the number of rotations of each rotation shaft, by rotating each rotation shaft in the same direction, A first shear field is formed between the outer circumference of each rotor and the inner wall surface of the container, and a second shear field is formed between the side surfaces of the pair of rotors on the adjacent rotating shafts. A method for stirring a viscous substance, which comprises continuously kneading a treated material introduced from the inlet in the first and second shearing fields and sending the kneaded material to the outlet. 12. The method for stirring a viscous substance according to claim 11, wherein the number of revolutions of each of the rotating shafts is periodically increased and decreased.