JP3628110B2 - Horizontal reactor for stirring high viscosity substances - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a reaction system that generates a viscous high-viscosity substance during the progress of the reaction, such as a continuous polymerization reaction, for promoting the progress of the reaction while stirring and mixing the high-viscosity substance. The present invention relates to a horizontal reactor. The target reaction type in the apparatus of the present invention may be any of polycondensation, addition polymerization, ring-opening polymerization and the like, and the reaction mode is melt polymerization, solution polymerization, interfacial polymerization, suspension polymerization, emulsion polymerization, bulk polymerization. Any gas phase polymerization may be used. In short, any reaction system that generates a viscous high-viscosity substance during the progress of the polymerization reaction can be applied.
[0002]
[Prior art]
In order to produce a polymer material such as polyethylene, it is common to supply a raw material having a relatively low viscosity into a reaction vessel and take out a viscous product as a product while a polymerization reaction proceeds in the reaction vessel. Is. Various devices have been proposed so far for achieving such a reaction.
[0003]
For example, “Polymerization” (supervised by Satoshi Imoto, published by Chemical Industry Co., Ltd. on February 28, 1966) discloses a horizontal continuous polymerization can for ethylene derivative bulk polymerization that has a ribbon blade for stirring. ing. This polymerization can is configured to promote stirring and mixing inside the polymerization can by a stirring blade having a stirring shaft at the center of the polymerization can.
[0004]
However, such an apparatus configuration has a drawback that the produced polymer is likely to adhere to the stirring shaft because the stirring effect near the stirring shaft existing in the central portion of the polymerization can is low. When such polymer adhesion occurs, the residence time cannot be controlled by the adhering polymer admixed irregularly in the product or peeled off. As a result, the quality of the polymer as a product deteriorates.
[0005]
As devices for solving such problems, devices such as Japanese Patent Laid-Open Nos. 48-33996 and 57-30531 have been proposed. Among these, the former device is “divided into two or more sections by a circular partition plate with a pitch inside, which has a cut for liquid feeding, and has a shaft at both ends and a shaft in the middle. A rotor with a scraping plate to stir the liquid does not have contact with a substantially horizontal outer shell having a heating device with a gap as small as possible below, and the generated steam is easily above It is installed so as to be in contact with a large gap so that it can pass through. On the other hand, the latter apparatus is a horizontal continuous reaction tank having an inlet at one end and an outlet at the other end, which is composed of two or more rotatable circular discs, and provided with a partition plate and at least two chambers in the tank. The configuration is divided into
[0006]
The common features of these devices are that the reactor contents are scraped up by a plate-shaped scraping plate as an axisless rotor, and that the reaction chamber is divided into two or more chambers by a notch disc. Can be mentioned. Therefore, in these techniques, it can be said that the stirring / mixing effect of the contents is excellent up to about several thousand poises in the operation of sending the contents to the next chamber while being scraped up by the scraping plate. In these devices, since there is basically no shaft member in the central portion, there is no problem in the above-described prior art.
[0007]
However, when the viscosity of the contents reaches a high viscosity of about 5000 to 10,000 poise, it is difficult to send the contents to the next chamber while stirring and mixing effectively only by a scraping operation with a scraping plate. In addition, such a device must have excellent so-called self-cleaning properties so that no residue remains in the device when the contents are sent to the next chamber. It cannot be said that the characteristics are necessarily good.
[0008]
[Problems to be solved by the invention]
The present invention has been made to solve these conventional problems. The object of the present invention is to effectively stir and mix even a high-viscosity substance having a viscosity of about 5000 to 10,000 poises, and to perform self-cleaning. Another object of the present invention is to provide a horizontal reaction apparatus for stirring a high-viscosity substance having excellent properties.
[0009]
[Means for Solving the Problems]
The apparatus of the present invention that can achieve the above-mentioned object is a horizontal reaction apparatus for stirring a high-viscosity substance having a viscosity of 5000 to 10000 poise, in which a hollow cylindrical reaction container is installed in a horizontal form, There is no shaft member in the direction of the rotation axis, and a plurality of rod-like blade holding members are installed in the reaction vessel in the longitudinal direction, and the blade holding member has one or more blades radially outward. The outer ribbon wing and one or more inner ribbon wings are installed on the radially inner side, and the outer ribbon wing is installed such that all of the outer peripheral portion is placed close to the inner surface of the reaction vessel. It has a gist.
[0010]
In this horizontal reaction apparatus, in addition to the above configuration, a connection arm for connecting a rotary drive shaft and a blade holding member arranged outside the reaction container is housed in the reaction container, and this connection arm It is also useful to have a configuration having a torsion angle that scrapes both end surfaces of the reaction vessel in accordance with the rotation of the rotation drive shaft. Is even better.
[0011]
In these horizontal reactors, the outer ribbon wing and the inner ribbon wing may be installed at various ribbon pitches so that the contents are fed in the same direction or in opposite directions. Embodiments can be employed.
[0012]
In the horizontal reactor, by providing the outer ribbon blade and the inner ribbon blade, the rotation region by the ribbon blade can be formed into two cylindrical layers, thereby effectively achieving the effect of stirring and mixing the contents. The Further, it is useful that the temperature of the contents can be controlled by surrounding the jacket with a jacket through which the heat medium or refrigerant can pass and controlling the temperature of the reactor by passing the heat medium or refrigerant through the jacket. .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The configuration and operational effects 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 device of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in 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, and 8 is an outlet. Each one is shown.
[0014]
The reaction vessel 1 has a hollow cylindrical shape, and the raw material is supplied from the supply port 7 to advance the polymerization reaction in the reaction vessel 1, and the polymer as a product is taken out from the outlet 8. Although not shown, the reaction vessel 1 is appropriately equipped with a liquid level monitoring nozzle, a sample nozzle for contents, and the like, and in the case of a reaction system that generates volatile substances during the progress of the reaction, A discharge port for discharging the volatile substance is provided in the upper center portion of the reaction vessel 1. In FIG. 1, 20 is a space filled with contents.
[0015]
The wing holding member 5 is usually a round bar having a circular cross section perpendicular to the axis, but may be a rod-shaped member having an elliptical or polygonal cross section as long as the resistance to the contents is minimized. good. A plurality (two in this embodiment) of blade holding members 5 are installed in the reaction vessel 1 in the longitudinal direction (that is, in the horizontal direction in FIG. 1). The blade holding member 5 is provided with a spiral outer ribbon blade 2 on the outer side and a spiral inner ribbon blade 3 on the radially inner side. Of these, the outer ribbon blade 2 is installed with its outer peripheral portion being close to the inner surface of the reaction vessel 1.
[0016]
The connection plate 6 is provided to connect the rotary drive shaft 4 and the blade holding member 5 and is usually formed in a disk shape. However, if the connection plate 6 can hold the blade holding member 5, it has a rod shape. It can also be a connecting arm. When such a connection arm configuration is employed, a configuration having a torsion 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 employed. Adopting this is preferable, and this also improves the self-cleaning property at the both end surface portions. In the above configuration, two blade holding members 5 are installed. However, the number of the blade holding members 5 in the device of the present invention is not limited to two, and may be set as appropriate considering its strength. If the amount is too large, the resistance during stirring / mixing increases, so about 4 at most is appropriate.
[0017]
In this apparatus, 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 constitute a stirring / mixing mechanism. In other words, the rotational driving force from the rotational driving shaft 4 (rotational driving force in the direction of arrow X in FIG. 1) is transmitted to the blade holding member 5 through the connection plate 6, whereby the blade holding member 5 is moved into the reaction vessel 1. Thus, the outer ribbon blade 2 and the inner ribbon blade 3 are rotated in accordance with the rotational movement around the rotational axis. The contents in the reaction apparatus move in the reaction vessel while being effectively stirred and mixed by the rotational motion of the outer ribbon blade 2 and the inner ribbon blade 3. Moreover, in this apparatus, as shown in the figure, no shaft member is present in the reaction vessel 1 in the direction of the rotational axis.
[0018]
By the way, in the apparatus configuration shown in FIGS. 1 and 2, the outer ribbon blade 2 sends the contents in the right-hand direction in FIG. Are configured with appropriate torsion angles so as to send the contents in the left-hand direction of FIG. By adopting such a configuration, the content (raw material) supplied from the left end side of the reaction vessel 1 is sent to the right hand direction of FIG. 1 by the outer ribbon blade 2 and the content existing on the right end side of the reaction vessel 1. The material is fed in the left-hand direction in FIG. 1 by the inner ribbon blade 3, and at this time, the contents from both are replaced in the vicinity of the blade holding member 5 to further promote mixing and stirring of the content in the reaction vessel 1. Will be.
[0019]
However, the feeding direction of the contents by the outer ribbon blade 2 and the inner ribbon blade 3 is not necessarily the opposite direction, and may be the same direction, and the ribbon pitches of the ribbon blades 2 and 3 are the same or different. In short, as long as the rotation region of the outer ribbon blade 2 and the inner ribbon blade 3 has a function of forming two or more cylindrical layers, the contents are stirred and mixed. It will be. In the apparatus shown in FIGS. 1 and 2, the outer ribbon blade 2 and the inner ribbon blade 3 are each installed one by one, but it is needless to say that any two or more may be installed. .
[0020]
The outer peripheral portion of the outer ribbon blade 2 is installed so as to be close to the inner surface of the reaction vessel 1, and this proximity gap is set to an appropriate value from the viewpoint of improving the self-cleaning property, but it is 20 mm or less. Is preferable, and more preferably 5 mm. In addition, 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.
[0021]
According to the apparatus shown in FIGS. 1 and 2, since there is no shaft member in the direction of the rotation axis in the reaction vessel 1, the conventional problem of polymer adhering to the shaft member does not occur, and the blade Due to the stirring driving force by the outer ribbon blade 2 and the inner ribbon blade 3 firmly held by the holding member 5, even a high-viscosity substance having a viscosity of about 5000 to 10000 poise is reliably stirred and mixed. Moreover, by setting the gap between the inner surface of the reaction vessel 1 and the outer ribbon blade 2 and the connection plate 6 to appropriate values, good self-cleaning properties can also be achieved.
[0022]
FIG. 3 is a schematic explanatory view showing another embodiment of the device of the present invention. The basic configuration is similar to the device configuration shown in FIGS. 1 and 2, and corresponding parts are denoted by the same reference numerals. Avoid duplicate explanations. In the apparatus configuration shown in FIGS. 1 and 2, the outer ribbon wing 2 and the inner ribbon wing 3 are basically composed of a spiral integral member. In this embodiment, the outer ribbon wing 2 2a and the inner ribbon blade 3a are configured intermittently. That is, in this apparatus configuration, the outer ribbon wing 2a and the inner ribbon wing 3a are each constituted by a plurality of members, and among these, the outer ribbon wing 2a is particularly close to the inner wall surface of the reaction vessel at the cut portion. 5 are connected by a scraping bar 9 installed in parallel with 5. The scraping bar 9 exhibits a function of scraping the contents adhering to the inner surface of the reaction vessel 1, thereby ensuring a good self-cleaning property. Further, by intermittently installing a ribbon blade having a feeding mechanism and making the outer ribbon blade 2a and the inner ribbon blade 3a independent as one combination part, the plug flow property (extrusion flow property) is also improved. (See Fig. 4 below for plug flow properties).
[0023]
FIG. 4 is a schematic explanatory view showing still another embodiment of the apparatus of the present invention, and FIG. 5 is a cross-sectional view taken along the line BB in FIG. In the apparatus shown in FIGS. 4 and 5, the functions of the reaction vessel 1, the connection plate 6 and the like are the same as those in the apparatus shown in FIGS. 1 and 2, and are given the same reference numerals. In this apparatus, instead of the outer ribbon blades 2, 2a and the inner ribbon blades 3, 3a shown in FIGS. 2) and the contents in the reaction vessel 1 are stirred and mixed by the scraping member 16. The scraping member 16 is composed of scraping blade pieces 9 to 14 divided into a plurality of areas by a plurality of holding rings 15 installed in the longitudinal direction (left and right direction in FIG. 4). ˜14 has one or more holes.
[0024]
In the apparatus shown in FIGS. 4 and 5, the configuration of various scraping blade pieces 9 to 14 is shown, but the outer peripheral side of each scraping blade piece 9 to 14 is brought close to the inner surface of the reaction vessel 1. Thus, a good self-cleaning property of the inner surface of the reaction vessel 1 is achieved. In the apparatus shown in FIGS. 1 and 2, each of the outer ribbon wing 2 and the inner ribbon wing 3 has a function of feeding contents by itself, but in the apparatus shown in FIGS. The apparatus does not have a content feeding function, and the movement of the contents is achieved by supplying the contents from the supply port 7 while applying pressure. 4 and 5, only two locations in the circumferential direction of the reaction vessel 1 are shown, but a plurality of scraping members 16 are provided at appropriate locations in the circumferential direction of the reaction vessel 1 (for example, about 2 to 8 locations). ) Installed.
[0025]
As described above, the apparatus shown in FIGS. 4 and 5 shows the configuration of various scraping blade pieces 9 to 14. The configuration of each scraping blade piece 9 to 14 is as follows. First, the scraping blade pieces 9, 11 and 14 are formed with slit-like holes 9a, 11a and 14a. Of these, the scraping blade pieces 11 are formed so that the radially inner side is inclined. is there. The scraper blade 12 has a large number of round holes 12a, but it goes without saying that long holes or square holes may be formed instead of the round holes. The scraper blade 13 exhibits a function as a hole by using a net-like member. The scraping blade piece 10 is a combination of the scraping blade pieces 9, 11, and 12. As shown in FIG. 4, the scraping member 16 may be configured by combining various scraping blade pieces 9 to 14, but any one kind of scraping blade pieces 9 to 14 is used. The scraping member 16 may be configured. Then, by forming the scraping member 16 with the scraping blade pieces 9 to 14 having the holes as described above, the stirring resistance force against the scraping member 16 of the high-viscosity substance can be reduced. Even if it is a high-viscosity substance of about 5000 to 10,000, it can be effectively stirred and mixed.
[0026]
By the way, the scraping member 16 is composed of scraping blade pieces 9 to 14 divided into a plurality of areas by a plurality of holding rings 15 installed in the longitudinal direction. By adopting such a configuration, the reaction vessel The stirring / mixing region in 1 can be divided into small chambers to maintain good plug flow properties as a reactor. 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 region in the reaction vessel 1 is divided into small chambers. Thus, a flow (overflow flow) as indicated by an arrow Y (FIG. 4) is generated, and by this, it is sent to the next chamber step by step, so that a good plug flow property can be maintained.
[0027]
In the apparatus shown in FIGS. 4 and 5, as described above, the outer peripheral side of each scraping blade piece 9 to 14 is installed close to the inner surface of the reaction vessel 1, and this proximity gap provides self-cleaning properties. Although it is set to an appropriate value from the viewpoint of making it favorable, it is preferably 20 mm or less, more preferably 5 mm, similarly to the apparatus shown in FIG. 4 and 5, since the shaft member does not exist in the reaction vessel 1 in the direction of the rotation axis, the conventional problem that the polymer adheres to the shaft member does not occur.
[0028]
In the apparatus configuration shown in FIGS. 1 to 5, a configuration in which one supply port 7 is provided on one end side of the reaction vessel and an outlet 8 is provided on the other end is employed. The installation location is not limited to the illustrated position, and an appropriate position may be selected. The number of the supply ports 7 is not limited to one, and a plurality of supply ports 7 can be installed according to the operation conditions. Further, by appropriately selecting the installation location of the supply port 7 and the outlet 8, the apparatus of the present invention can be used alone as a batch system, and the outlet 8 of one device and the supply port 7 of another device are connected. In this way, the reaction product can be continuously produced by connecting two or more apparatuses in series.
[0029]
Whichever configuration is adopted, the reaction vessel is surrounded by a jacket through which a heat medium or refrigerant can pass, and the temperature of the reaction apparatus is controlled by passing the heat medium or refrigerant through the jacket. This is useful because the temperature of the contents can be controlled. That is, the reaction targeted in the present invention includes various reaction forms such as endothermic reaction and exothermic reaction. Regardless of which reaction form is employed, the temperature of the contents in the reaction vessel 1 is controlled. By maintaining the temperature suitable for the reaction, an effective reaction proceeds.
[0030]
In addition, about the rotation speed of a rotational drive shaft, when a reaction is advanced, what is necessary is just to set an appropriate value with the viscosity of the content, but it is usually 100 rpm or less, and generally rotation speed of about 2-30 rpm. Is preferred.
[0031]
【The invention's effect】
The present invention is configured as described above, and even if it is a high-viscosity substance having a viscosity of about 5000 to 10000 poise, it can be effectively stirred and mixed, and has a self-cleaning property and is a horizontal type for stirring a high-viscosity substance. A reactor was realized.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing an embodiment of the device of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in 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.
5 is a cross-sectional view taken along line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reaction container 2, 2a Outer ribbon wing | blade 3,3a Inner ribbon wing | blade 4 Rotation drive shaft 5 Blade | wing holding member 6 Connection board 7 Supply port 8 Outlet 9-14 Lifting blade piece 15 Holding ring 16 Lifting member

Claims (5)

A horizontal reaction apparatus for stirring a high-viscosity substance having a viscosity of 5000 to 10000 poise in which a hollow cylindrical reaction vessel is installed in a horizontal shape, and there is no shaft member in the rotational axis direction in the reaction vessel, and in the reaction vessel wings holding rod-like member is a plurality of installed longitudinally on the wing holding member, and a radially outwardly one or more outer ribbon blade thereof, s in its radially inner A horizontal reactor for stirring a high-viscosity substance, characterized in that the inner ribbon blade is installed and the outer ribbon blade is disposed in such a manner that the entire outer peripheral portion thereof is installed close to the inner surface of the reaction vessel. A horizontal reaction apparatus for stirring a high-viscosity substance having a viscosity of 5000 to 10000 poise in which a hollow cylindrical reaction vessel is installed in a horizontal shape, and there is no shaft member in the rotational axis direction in the reaction vessel, A plurality of rod-shaped blade holding members are installed in the reaction vessel in the longitudinal direction. The blade holding member includes one or more outer ribbon blades on the radially outer side and one or more on the radially inner side. The outer ribbon blade is installed, and the outer ribbon blade is installed in such a manner that the entire outer peripheral portion thereof is placed close to the inner surface of the reaction vessel, and the rotary drive shaft and the blade holding member arranged outside the reaction vessel. A connection arm for connecting the two is accommodated in the reaction vessel, and the connection arm has a twist angle such that both end surfaces of the reaction vessel are scraped according to the rotation of the rotation drive shaft. High viscosity characterized by Horizontal reaction apparatus for quality stirring. Outer ribbon blade and the inner ribbon wings, as the feeding direction of the contents of the reaction vessel is the same or the opposite direction, the same or according to claim 1 or 2 in which is installed in a different ribbon pitches Horizontal reactor. The horizontal reactor according to any one of claims 1 to 3 , wherein a rotation region by the outer ribbon blade and the inner ribbon blade is formed into two or more cylindrical layers. The horizontal reactor according to any one of claims 1 to 4, wherein the temperature of the contents can be controlled by surrounding with a jacket through which a heat medium or a refrigerant can pass.

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