JPH10342A - Horizontal type reaction apparatus for agitating high-viscosity material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to efficiently agitate and mix high-viscosity materials as well by installing single or plural outer ribbon vanes and inner ribbon vanes to a plurality of vane members installed in a reaction vessel and installing these ribbon vanes by bringing the outer peripheral parts of the outer ribbon vanes in proximity to the inside surface of the reaction vessel. SOLUTION: The reaction vessel 1 is supplied with raw materials from a supply port 7 and a polymn. reaction is progressed therein. A polymer is taken out of a take-out port 8. The outer ribbon vanes 2 are installed to the outer side of a plurality of the vane holding members 5 installed longitudinally in the reaction vessel 1 and the inner ribbon vanes 3 are installed to the inner side in the radial direction thereof. The outer ribbon vanes 2 among these ribbon vanes are installed by bringing the outer peripheral parts thereof in proximity to the inside surface of the reaction vessel 1. Connecting plates 6 are disposed to connect revolving drive shafts 4 and vane holding members 5, by which the vane holding members 5 are rotationally moved with the rotational driving force from the revolving drive shafts 4 and the contents in the reaction vessel 1 are effectively agitated and mixed by the rotational motion of the outer ribbon vanes 2 and the inner ribbon vanes 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a reaction system in which a viscous high-viscosity substance is produced during the progress of a reaction, such as a continuous polymerization reaction, while stirring and mixing the high-viscosity substance. The present invention relates to a horizontal reaction apparatus for accelerating the progress of the reaction. The reaction mode of interest in the apparatus of the present invention may be any of polycondensation, addition polymerization, ring-opening polymerization, etc., and the reaction mode includes melt polymerization, solution polymerization, interfacial polymerization, suspension polymerization, emulsion polymerization, bulk polymerization. Or any of gas-phase polymerizations. In short, any reaction system that produces a viscous high-viscosity substance during the progress of the polymerization reaction can be used.

[0002]

2. Description of the Related Art In order to produce a polymer material such as polyethylene, a raw material having a relatively low viscosity is supplied into a reaction vessel.
In general, a viscous product is taken out as a product while the polymerization reaction proceeds in the reaction vessel. Various devices have been proposed to achieve such a reaction.

[0003] For example, "Polymerization" (supervised by Minoru Imoto, 1
Feb. 28, 966 (published by Chemical Industry Co., Ltd.) discloses a horizontal continuous polymerization vessel for bulk polymerization of ethylene derivatives, which incorporates a stirring ribbon blade. This polymerization can is configured such that stirring and mixing inside the polymerization can is promoted by a stirring blade provided with a stirring shaft at the center of the polymerization can.

However, with such a device configuration,
There is a disadvantage that the produced polymer easily adheres to the stirring shaft because the stirring effect is low near the stirring shaft existing in the center of the polymerization can. When such polymer adhesion occurs, the residence time cannot be controlled due to the admixed polymer being irregularly mixed into the product or peeling off. As a result, the inconvenience that the quality of the polymer as a product is deteriorated is caused.

As an apparatus for solving such a problem,
For example, JP-A-48-33996 and 57-30531
And other devices have also been proposed. The former device is
"The interior is divided into two or more sections by a circular partition plate with a pitch, which has a cut for liquid supply, has a shaft at both ends, and has no shaft in the middle and stirs the liquid. A rotor with a structure with a lifting plate contacts the substantially horizontal shell with a heating device with a gap as small as possible below and with a large gap above so that generated steam can easily pass through. It is a configuration that is installed in the same way.
On the other hand, the latter device is composed of two or more rotatable notched disks in a horizontal continuous reaction tank having an inlet at one end and an outlet at the other end, and providing a partition plate to at least two chambers in the tank. Is divided into "".

[0006] These devices have in common that the contents of the reactor are scraped up by a plate-shaped scraping plate as a shaftless rotor and that the reaction chamber is divided into two or more chambers by a notched disk. It is mentioned as a feature point. Therefore, in these techniques, it can be said that, in the operation of feeding the contents to the next chamber while scraping the contents with the scraper, up to about several thousand poise, the effect of stirring and mixing the contents is excellent. Further, in these devices, since there is basically no shaft member at the central portion, the above-described problem in the related art does not occur.

However, the viscosity of the contents is 5,000 to
When the viscosity becomes as high as about 10,000 poise, it is difficult to send the contents to the next chamber while effectively stirring and mixing the contents only by a scraping operation using a scraping plate. In addition, in such an apparatus, it is necessary to have excellent so-called self-cleaning properties so that no residue remains in the apparatus when the contents are sent to the next room. The characteristics are not always good.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a method for effectively using a high-viscosity substance having a viscosity of about 5,000 to 10,000 poise. Another object of the present invention is to provide a horizontal reactor for stirring a high-viscosity substance, which is capable of stirring and mixing at high speed and is excellent in self-cleaning properties.

[0009]

The apparatus of the present invention, which has achieved the above object, is a horizontal reactor for stirring a high-viscosity substance, in which a hollow cylindrical reaction vessel is installed horizontally. There is no shaft member in the direction of the rotation axis, and a plurality of rod-shaped blade holding members are installed in the reaction vessel in the longitudinal direction. One or a plurality of outer ribbon blades are provided in the blade holding member. And one or more inner ribbon blades are installed, and the outer ribbon blades are installed so that their outer peripheral portions are close to the inner surface of the reaction vessel. It is.

[0010] In this horizontal reactor, the outer ribbon wing and the inner ribbon wing are installed at various ribbon pitches such as at the same or different ribbon pitch so that the feeding direction of the contents of the reaction vessel is the same or opposite. The form can be adopted.

In the above-mentioned horizontal reactor, by providing the outer ribbon wing and the inner ribbon wing, the rotation region of the ribbon wing can be formed into two or more cylindrical layers, whereby the effect of stirring and mixing the contents can be obtained. Achieved effectively. It is also useful to surround the structure with a jacket through which a heat medium or a refrigerant can pass, and to control the temperature of the reactor by passing the heat medium or the refrigerant through the jacket to control the temperature of the contents.

On the other hand, there is provided a horizontal reactor for stirring a high-viscosity substance in which a hollow cylindrical reaction vessel is installed in a horizontal manner, wherein no shaft member exists in the direction of the rotation axis in the reaction vessel. A plurality of strip-shaped scraping members are installed in the reaction vessel in the longitudinal direction, and the scraping members are formed by scraping blade pieces divided into a plurality of areas by a plurality of holding rings installed at intervals in the longitudinal direction. A horizontal reaction apparatus having a configuration in which one or more holes are formed in the scraping wing pieces and the outer peripheral side of the scraping wing pieces is installed close to the inner surface of the reaction vessel. Even so, the object of the present invention can be achieved. Also in such a device, it is effective from the same viewpoint as described above to adopt a configuration in which the device is surrounded by a jacket through which a heat medium or a refrigerant can pass.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure, operation and effect of the device of the present invention will be described more specifically with reference to the drawings. FIG. 1 is a schematic explanatory view showing an embodiment of the apparatus of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 and 2, 1 is a reaction vessel, 2 is an outer ribbon blade, 3 is an inner ribbon blade, 4 is a rotary drive shaft, 5 is a blade holding member, 6 is a connection plate, 7 is a supply port,
Numeral 8 indicates an outlet.

The reaction vessel 1 has a hollow cylindrical shape, and a raw material is supplied from a supply port 7, a polymerization reaction proceeds in the reaction vessel 1, and a polymer as a product is taken out from an outlet 8.
Although not shown, the reaction vessel 1 is appropriately provided with a nozzle for monitoring the liquid surface, a nozzle for sampling the contents, and the like. In the case of a reaction system that generates volatile substances during the progress of the reaction, An outlet for discharging the volatile substance is provided in the upper central part of the reaction vessel 1. In FIG. 1, reference numeral 20 denotes a space filled with contents.

The wing holding member 5 is usually a round bar having a circular cross section perpendicular to the axis. However, if the resistance to the contents is minimized, the wing holding member 5 may be a rod-shaped member having an elliptical or polygonal cross section perpendicular to the axis. There may be. This wing holding member 5
A plurality (two in this embodiment) is installed in the reaction vessel 1 in the longitudinal direction (that is, the left-right direction in FIG. 1). The wing holding member 5 is provided with a helical outer ribbon wing 2 on its outer side and a helical inner ribbon wing 3 on its radially inner side. Of these, the outer ribbon blade 2 is installed such that its outer peripheral portion is close to the inner surface of the reaction vessel 1.

The connection plate 6 includes the rotary drive shaft 4 and the blade holding member 5.
And is usually formed in a disk shape, but may be a bar-shaped connecting arm as long as it can hold the wing holding member 5. In the case of adopting such a structure of the connecting arm, a structure having a twist angle that scrapes both end surfaces (left and right end surfaces in FIG. 1) of the reaction vessel 1 in accordance with the rotation of the rotary drive shaft 4 is adopted. It is preferable to adopt this, so that the self-cleaning property at the both end face portions is also improved. In the above configuration, two wing holding members 6 are provided,
The number of the blade holding members 6 in the apparatus of the present invention is not limited to two, and may be appropriately set in consideration of the strength. However, if the number is too large, the resistance at the time of stirring and mixing increases. Appropriate.

In this apparatus, an agitating / mixing mechanism is constituted by the outer ribbon blade 2, the inner ribbon blade 3, the rotary drive shaft 4, the blade holding member 5, and the connecting plate 6. That is,
The rotational driving force from the rotational drive shaft 4 (the rotational driving force in the direction of arrow X in FIG. 1) is transmitted to the blade holding member 5 via the connection plate 6, whereby the blade holding member 5 rotates in the reaction vessel 1. The outer ribbon wing 2 and the inner ribbon wing 3 rotate accordingly in the rotational movement around the axial direction. The contents in the reaction apparatus move in the reaction vessel while being effectively stirred and mixed by the rotational movement of the outer ribbon blade 2 and the inner ribbon blade 3. Further, in this apparatus, as shown in the figure, the shaft member does not exist in the reaction vessel 1 in the direction of the rotation axis.

By the way, in the apparatus configuration shown in FIGS. 1 and 2, with respect to the rotation direction of the rotary drive shaft 4 shown by the arrow X,
The outer ribbon wing 2 sends the contents to the right hand direction in FIG.
The inner ribbon wing 2 sends the contents in the left-hand direction of FIG.
Each is configured with an appropriate twist angle. By adopting such a configuration, the contents (raw materials) supplied from the left end side of the reaction vessel 1 are sent in the right-hand direction in FIG. The material is sent in the left-hand direction of FIG. 1 by the inner ribbon blade 2, and at this time, the contents from both are exchanged in the vicinity of the blade holding member 5 to further promote the mixing and stirring of the contents in the reaction vessel 1. Will be.

However, depending on the outer ribbon wing 2 and the inner ribbon wing 3, the contents may be sent in the same direction, not necessarily in opposite directions.
3 may be set to have the same or different ribbon pitch. In other words, if the outer ribbon wings 2 and the inner ribbon wings 3 have a function of forming two or more cylindrical layers in the rotation area, the content is changed. The effect of stirring and mixing is exhibited. In the apparatus shown in FIGS. 1 and 2, the outer ribbon wing 2 and the inner ribbon wing 3 are each provided one by one, but it is a matter of course that two or more may be provided. .

The outer peripheral portion of the outer ribbon blade 2 is provided so as to be close to the inner surface of the reaction vessel 1, and the close gap is set to an appropriate value from the viewpoint of improving the self-cleaning property. Is preferably
More preferably, it is set to 5 mm. Also, when the self-cleaning property is imparted to the connection arm, the gap between the reaction vessel 1 and the connection arm is preferably as described above.

According to the apparatus shown in FIGS. 1 and 2, the shaft member does not exist in the direction of the rotation axis in the reaction vessel 1, so that the conventional problem that the polymer adheres to the shaft member does not occur. Also, the stirring driving force of the outer ribbon wing 2 and the inner ribbon wing 3 firmly held by the wing holding member 5,
Even a high-viscosity substance having a viscosity of about 5,000 to 10,000 poise is surely stirred and mixed. Moreover,
By setting the gaps between the inner surface of the reaction vessel 1 and the outer ribbon blades 2 and the connection plate 6 to appropriate values, good self-cleaning properties can also be achieved.

FIG. 3 is a schematic explanatory view showing another embodiment of the apparatus of the present invention. The basic structure of the apparatus is similar to that of the apparatus shown in FIGS. To avoid duplicate explanations. In the device configuration shown in FIGS. 1 and 2, the outer ribbon wing 2 and the inner ribbon wing 3
Is basically composed of a helical integral member. In this embodiment, the outer ribbon blade 2a and the inner ribbon blade 3a have an intermittent structure. That is, in this device configuration, the outer ribbon blade 2a and the inner ribbon blade 3a are each composed of a plurality of members, and among these, the outer ribbon blade 2a is particularly a blade holding member near the inner wall surface of the reaction vessel at the cut portion. 5 are connected in parallel by a scraping bar 9 installed in parallel with the device 5. The scraping rod 9 has a function of scraping the contents adhered to the inner surface of the reaction vessel 1, thereby ensuring a good self-cleaning property. Further, a ribbon wing having a feed mechanism is intermittently installed, and the outer ribbon wing 2a and the inner ribbon wing 3 are provided.
The plug flow property (extrusion flow property) can also be improved by making each a independent as a combination part (see FIG. 4 described later for the plug flow property).

FIG. 4 is a schematic explanatory view showing still another embodiment of the apparatus of the present invention, and FIG. 5 is a sectional view taken along the line BB of FIG. In the apparatus shown in FIGS. 4 and 5, the functions of the reaction vessel 1 and the connecting plate 6 are the same as those in the apparatus shown in FIGS. 1 and 2, and the same reference numerals are given. In this apparatus, instead of the outer ribbon blades 2 and 2a and the inner ribbon blades 3 and 3a shown in FIGS. In this case, the contents in the reaction vessel 1 are stirred and mixed by the raising member 16. The plurality of holding members 1 provided in the longitudinal direction (the left-right direction in FIG. 4)
5 comprises a plurality of swept wing pieces 9 to 14 which are divided into a plurality of sections, and each of the swept wing pieces 9 to 14 is provided with one or a plurality of holes.

In the apparatus shown in FIGS. 4 and 5, the structure of the various scraping blade pieces 9 to 14 is shown, but the outer peripheral side of each of the scraping blade pieces 9 to 14 is the inner surface of the reaction vessel 1. Is installed in close proximity to the reaction vessel 1
This achieves good self-cleaning properties of the inner surface. In the apparatus shown in FIGS.
Each of the inner ribbon wing 3 and the inner ribbon wing 3 itself has a function of feeding the content. However, the apparatus shown in FIGS. Is achieved by supplying the contents from the supply port 7 while applying pressure. 4 and 5, only two positions in the circumferential direction of the reaction vessel 1 are shown. However, a plurality of scraping members 16 are provided at appropriate places in the circumferential direction of the reaction vessel 1 (for example, about 2 to 8 places). ) Will be installed.

As described above, in the apparatus shown in FIGS. 4 and 5, the structures of various scraping blade pieces 9 to 14 are shown.
The structure of each of the scraper blades 9 to 14 is as follows. First, the scraping blade pieces 9, 11, and 14 are slit-shaped holes 9a, 11
a and 14a are drilled, in which the scraper blade 11 is formed such that the radially inner side is inclined. Further, although the scraping blade 12 has a large number of round holes 12a, it goes without saying that a long hole or a square hole may be formed instead of the round hole. The scraper blades 13 function as holes by using a net-like one. The scraped wing pieces 10 are connected to the scraped wing pieces 9 and 1.
1 and 12 are combined. In addition, as shown in FIG. 4, the scraping member 16 includes various scraping blade pieces 9-1.
4 may be combined, or the scraping member 16 may be configured using any one of the scraping blade pieces 9 to 14. And the scraping wing pieces 9-1 having the holes as described above
By constituting the scraping member 16 by 4,
The agitation resistance of the high-viscosity substance to the scraping member 16 can be reduced, and even a high-viscosity substance having a viscosity of about 5,000 to 10,000 can be effectively stirred and mixed.

The scraping member 16 is composed of scraping blade pieces 9 to 14 divided into a plurality of sections by a plurality of holding rings 15 installed in the longitudinal direction.
By adopting such a configuration, the stirring / mixing region in the reaction vessel 1 can be divided into small chambers to maintain good plug flow properties as a reaction device. That is, the contents in the reaction vessel 1 move from the supply port 7 side to the take-out port 8 side. At this time, the stirring / mixing area in the reaction vessel 1 is divided into small chambers. A flow (overflow flow) as shown by an arrow Y (FIG. 4) through the
Good plug flow properties can be maintained.

In the apparatus shown in FIGS. 4 and 5, the outer peripheral side of each of the scraping blade pieces 9 to 14 is installed close to the inner surface of the reaction vessel 1 as described above. The value is set to an appropriate value from the viewpoint of improving the cleaning property, but is preferably 20 mm or less, more preferably 5 mm as in the apparatus shown in FIG. Also, according to the apparatus shown in FIGS. 4 and 5, since no shaft member exists in the direction of the rotation axis in the reaction vessel 1,
The conventional problem that the polymer adheres to the shaft member does not occur.

In the apparatus configuration shown in FIGS. 1 to 5, one supply port 7 is provided at one end of the reaction vessel and an outlet 8 is provided at the other end. The location of the outlet 8 is not limited to the illustrated position,
What is necessary is just to select an appropriate position. The number of the supply ports 7 is not limited to one, and a plurality of supply ports 7 can be provided according to operating conditions. In addition, by appropriately selecting the locations of the supply port 7 and the outlet 8, the apparatus of the present invention can be used alone as a batch type, and the outlet 8 of one apparatus can be used.
By connecting two or more devices in series with each other so that the supply port 7 of the other device is connected, a reaction product can be continuously generated.

Regardless of the configuration employed, the reaction vessel is surrounded by a jacket through which a heat medium or a refrigerant can pass, and the temperature of the reactor is controlled by passing the heat medium or the refrigerant through the jacket. This is useful because the temperature of the contents can be controlled. That is, the reactions targeted in the present invention include various reaction forms such as an endothermic reaction and an exothermic reaction, and in any case, the temperature of the contents in the reaction vessel 1 is controlled. By maintaining the temperature at a temperature suitable for the reaction, an effective reaction proceeds.

The number of revolutions of the rotary drive shaft when the reaction proceeds may be set to an appropriate value depending on the viscosity of the contents, but is usually 100 rpm or less, generally about 2 to 30 rpm. Is preferable.

[0031]

The present invention is constituted as described above. Even if it is a high-viscosity substance having a viscosity of about 5,000 to 10,000 poise, it can be effectively stirred and mixed and has a high self-cleaning property. A horizontal reactor for stirring viscous substances has been realized.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the apparatus of the present invention.

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

FIG. 3 is a schematic explanatory view showing another embodiment of the device of the present invention.

FIG. 4 is a schematic explanatory view showing still another embodiment of the present invention.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reaction container 2, 2a Outer ribbon blade 3, 3a Inner ribbon blade 4 Rotation drive shaft 5 Blade holding member 6 Connection plate 7 Supply port 8 Outlet 9-14 Scooping blade piece 15 Holding ring 16 Scooping member

Continuing from the front page (72) Koji Yamamoto 1-5-5 Takatsukadai, Nishi-ku, Kobe City, Kobe Steel Works, Kobe Research Institute

Claims (6)

[Claims] 1. A horizontal reactor for stirring a high-viscosity substance in which a hollow cylindrical reaction vessel is installed in a horizontal manner, wherein no shaft member exists in the direction of the rotation axis in the reaction vessel. A plurality of rod-shaped wing holding members are installed in the longitudinal direction in the reaction vessel, and one or more outer ribbon wings and one or more inner ribbon wings are installed on the wing holding member, and the outer ribbon A horizontal reactor for agitation of a high-viscosity substance, characterized in that the blade has an outer peripheral portion installed close to the inner surface of the reaction vessel. 2. The outer ribbon wing and the inner ribbon wing are arranged at the same or different ribbon pitch so that the contents of the reaction vessel are fed in the same or opposite directions. 4. The horizontal reactor according to 1. 3. The horizontal reactor according to claim 1, wherein a rotation region formed by the outer ribbon wing and the inner ribbon wing has a shape of two or more cylindrical layers. 4. The horizontal reactor according to claim 1, wherein the temperature of the contents can be controlled by surrounding it with a jacket through which a heat medium or a refrigerant can pass. 5. A horizontal reactor for stirring a high-viscosity substance in which a hollow cylindrical reaction vessel is installed horizontally, wherein no shaft member is present in the direction of the rotation axis in the reaction vessel. A plurality of strip-shaped scraping members are installed in the reaction vessel in the longitudinal direction, and the scraping members are formed by scraping blade pieces divided into a plurality of areas by a plurality of holding rings installed at intervals in the longitudinal direction. A high viscosity, wherein one or a plurality of holes are formed in the scraping wing pieces, and an outer peripheral side of the scraping wing pieces is installed close to an inner surface of the reaction vessel. Horizontal reactor for stirring materials. 6. The horizontal reactor according to claim 5, wherein the temperature of the contents can be controlled by surrounding it with a jacket through which a heat medium or a refrigerant can pass.