JPH0534758Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly relates to an apparatus that continuously processes a viscous substance by kneading it and inducing various chemical reactions using an additive substance and a heating medium.

[Prior Art] The elements that are particularly required when processing high-clay materials, slurry-like materials, etc. include sufficient kneading ability, heat transfer effects, and uniform reaction progress, as well as members that perform the kneading action. It is important that no material adheres to the surface of the Accumulation of sticky substances on the operating parts creates a large resistance to drive, which can lead to decreased functionality and failure of the device. For this reason, a mixing device with a self-cleaning function is highly valued. As a prior art, Japanese Patent Publication No. 44-14274 discloses a horizontal mixer in which two rotating shafts are arranged horizontally in a mixer chamber, and paddles that are substantially lens-shaped and have the same cross section are engaged with each shaft. ing. The paddles are arranged so that one major axis is perpendicular to the other, so that the tip of the paddle sweeps not only the walls of the surrounding cylinder, but also the surfaces of each other, thus attempting to mix. The company claims that it prevents materials from adhering to each other and enables homogeneous mixing and kneading of materials.

Even in the case of vertical kneading machines, there are some conventional techniques that focus on this point.

For example, Utility Model Publication No. 63-49299, Figure 5 I,
(b) A plurality of thick disc-shaped stirring plates 5a are coupled to the two rotating shafts 4a, 4a in series in the surface thickness direction, and a slight gap is left between the stirring plates in a cross section perpendicular to the rotating shafts, or Or have a shape that lightly touches the
The center of each stirring plate does not coincide with the axis of the rotating shaft, and the container has an inner wall slightly larger than the outermost trajectory of the stirring plate.

With this configuration, each stirring plate revolves while rotating on its own axis, and is adjacent to each other with only a small gap between them, so that the material adhered to the surface of the stirring plate is always peeled off by the surface of the other stirring plate. Produces a self-cleaning effect on the surface. Furthermore, since the same effect is exerted between the stirring plate and the inner wall of the container, problems caused by adhesion of materials can be prevented as a whole.

In addition, JP-A-61-103528, Figures 6 (a) and (b) also disclose a vertical twin-shaft kneading machine, which has two rotating shafts with a slight gap between them and the inner wall of the main body. It is a reaction device with multiple blades installed facing each other and 90 degrees out of phase with each other, and is said to be able to prevent the adhesion of high clay liquid and effectively promote the reaction.

[Problems to be Solved by the Invention] Comparing horizontal and vertical type processors of the prior art, the horizontal type has several problems, which are often solved by the vertical type. In other words, the vertical type allows the action of gravity to be incorporated into the internal action. For example, the level of the material being supplied can always be kept constant using its own weight, whereas in the horizontal type, gravity acts perpendicular to the axial direction.
Adjustment of material levels becomes quite difficult. Particularly fluid materials accumulate at the bottom of the kneading container.
Sometimes they suffer from clumsiness, such as leaks.

For this reason, in the vertical type, the maximum compression area is averaged and the quality of the product is uniform, whereas in the horizontal type, internal kneading and other effects work unevenly, which tends to cause uneven quality.

In the horizontal type, this uneven effect applies amplified torsion and bending moment to the rotating shaft, making it necessary to strengthen the rotating shaft and increase its size.

With the vertical type, there is no lateral load and there is no deflection due to the weight of the rotating member, so the gaps between the paddles and between the paddles and the inner wall of the container can be minimized. Needless to say, it is effective in self-cleaning and improving heat transfer as a result. Further, this gap needs to be set large in consideration of the deflection which increases as the size of the horizontal type increases, so the above-mentioned reduction in the effect of the increased size of the horizontal type is unavoidable. The vertical type does not have the room for such efforts, and even if it is large-sized, excellent kneading and self-cleaning effects are always guaranteed.

Another feature of the vertical type is that it is possible to freely adjust the residence time of the material in the kneading container by utilizing its own weight, and in particular, it is possible to extremely slow the material's progress. This gives the material a long-term effect associated with the reaction within the container, and allows the material to be modified, denatured, etc. freely. Furthermore, taking advantage of this characteristic, it can be used in a single device, and in some material processing it can be used as a continuous method, while in other material processing, long-term kneading can be added to each charged material in a batch method.
After the desired modification, the operation of discharging 100% and charging the new material again is repeated, making it possible to use a mode of continuous batch use.

In this respect, the vertical type can be said to be extremely advantageous.

However, this general advantage of the vertical type is often a weakness in the expectation of strong reactivity.
In general, the vertical twin-screw type, including the two mentioned above, feeds highly viscous material from above, receives 100% gravity, and is sent downward while undergoing stirring action. Therefore, in the earlier cited example, it is most suitable for specific fields such as polymerizable organic compounds such as olefins, and polycondensed polymers such as polyamide, and in the later cited example, it is most suitable for mixing high clay liquid and low clay liquid. is the central purpose of implementation.

However, for example, polymerization or condensation of polyester, polyacetal, phenol, etc.
It is desired in many ways for processing highly viscous substances, which require not only simple mixing but also kneading, qualitative changes, and reactions that sometimes involve phase changes.

Kneading is a complex combined action that involves mixing and shearing. For example, when aiming to gelatinize starch, it is inherently difficult to expect such an action with vertical conventional technology, and it is also difficult to expect such an action to occur due to the gravitational action. This results in the opposite problem of significantly losing the time to receive the effect.

In order to solve the above-mentioned problems, the present invention aims to provide a new vertical processor that extends the advantages of the vertical processor and alleviates its disadvantages.

[Means for Solving the Problems] The vertical processor according to the present invention has two parallel processors that rotate in the same direction and speed in a vertical plane inside a container.
A rotation axis of the book is provided, and the cross section to the rotation axis is lenticular,
Alternatively, a triangular flat paddle, a helical paddle whose front and back sides are twisted 0 to 30 degrees around the rotational axis with the same cross section, and a reverse helical paddle twisted in opposite directions are combined, so that the inner wall of the container and the paddles are slightly A material supply port is opened on one of the upper and lower sides of the container, and a material discharge port is opened on the other side, and the rotation shaft inside the supply port has a spiral shape. The area around the rotating shaft up to the discharge port is a kneading zone with a flat paddle, a kneading feed zone with a helical paddle, a kneading retention zone with a helical paddle and a reverse helical paddle, and any other combination of paddles. By forming an arbitrary zone at an arbitrary location over an arbitrary length, and by providing an additive supply port opening in the desired zone and a heating medium or refrigerant chamber surrounding the entire outer periphery of the container. The above problem was solved.

[Operation] The operation will be explained based on FIGS. 1A, 1B, and 1C showing the embodiment of the present application. In this example, two rotating shafts 4, 4 are vertically arranged and rotate in the same direction at the same speed, and the highly viscous material is pushed through the supply port 15 that opens at the bottom of the container 1, and the helical shaft 6 feeds the material. The action pushes it upward against gravity. A large number of paddles are attached to the upper shaft extending from here to the discharge port 16. When flat paddles with lens-shaped front and back sides aligned with each other are installed with a 90° phase difference, a kneading zone F is formed.

A kneading and feeding zone G is formed by attaching a lens-shaped helical paddle whose front and back sides are twisted up to 30 degrees with the phase changed in the axial direction (Figure 2). When the helical paddle and the reverse helical paddle are held together facing each other, the feeding action disappears and a kneading retention zone E is formed where only kneading is performed. The material is forcibly pushed upward from below, and undergoes a combination of gravitational action, reverse feeding action, and shearing action, and is gradually transformed qualitatively.
Further, it is pushed into the feeding action and reacts with the desired additives, is evenly kneaded and integrated, and is transformed into a desired form with the help of an appropriate heating medium, and then discharged.

In this way, the action of multiplying reaction chances by utilizing gravity action is a feature that is only allowed in the vertical type. On the other hand, if you place the supply port at the top and push it downwards, the reaction time can be shortened because the gravitational force acts positively. It can be said that another adjustment means has been added to the reaction adjustment. Although it depends on the reaction inside the container, in general, when gas is generated, it is easier to separate and escape with a vertical container, which reduces the chance of air bubbles being drawn in and damaging quality. can.

Next, if we focus on the individual actions in each cross section cut in the horizontal direction, we can see that whether the paddle is lens-shaped or triangular as shown in Figure 3 A and B, the kneading action of the paddle in this application is effective when there is a void in the cross section. However, it is applied evenly throughout and is not localized. This becomes clear when compared with the horizontal two-axis paddle processor shown in FIG. 7 for comparison, and the adverse effects of gravity are eliminated in each and every cross section.

[Example] Hereinafter, an example will be described based on FIGS. 1 to 5.

A heating medium chamber 3 is provided on the outer periphery of the container 1, and the inside of the container 2 is
A book shaft 4 passes through the book vertically and is connected to a lower driving machine. A paddle 5 and a feed blade 6 are fixed to a shaft 4 inside the container 2 and rotate in the same direction.

The heat medium chamber 3 on the outer periphery of the container 1 is provided with a heat medium supply port 15 and a heat medium discharge port 16 . A viscous material is fed into the container 2 from a supply port 11 provided at the lower end of the container 1, sent upward by a spiral shaft 6, kneaded by a paddle 5, and discharged as a product from a discharge port 12.

Additives (liquid, gas, etc.) are supplied to the viscous material being kneaded through supply ports 13 and 14 provided midway, and the chemical reaction and kneading continue until the material reaches the discharge port 12.

In this example, the feed zone D, kneading retention zone E, kneading zone F, kneading retention zone E, and kneading feed zone G are accumulated in order from the bottom to reach the discharge port, but of course, the ratio of these combinations and zones is The most suitable one is selected depending on the desired reaction of the desired material. In addition, all of the various paddles attached to the rotating shaft of this vertical processor are removable, which is similar to the conventional technology, but unlike the conventional technology, where only a single type of paddle is attached, In this invention, by changing the combination of paddle types, the zones where the action takes place, such as the kneading zone, retention zone, and feeding zone, can be freely rearranged to obtain the optimal conditions for the reaction and denaturation of the currently targeted substance. It has the characteristic that it can create a completely new control of operation by adjusting the action inside the container.

FIG. 4 shows a zone D in which the container 1 has two heat medium chambers, the lower heat medium chamber is a heating chamber 21, and the upper heat medium chamber is a cooling chamber 22, and the paddles 5 are combined as described above.
In combination with E, F, G and additive supply ports 13 and 14, a vertical processor capable of handling complex viscous substance chemical synthesis was created.

As already mentioned, in the case of a vertical processor, even if the number of paddles is large, the paddles are arranged vertically together with the shaft 4, so that the weight of the paddles does not cause the shaft 4 to bend. Therefore, there is no excessive contact with the inner wall of the container 2, which prevents wear between metals, and there is no restriction on increasing the capacity by forming a long processing space.

[Effects of the invention] The vertical processor according to the present invention takes advantage of the gravitational effect produced by the vertical structure, and not only eliminates the disadvantages, but even reverses them to advantages.

Therefore, among the treatments of highly caking materials, it exhibits an optimal effect particularly for reactions or kneading that involve high-level kneading or phase change, stably ensuring excellent quality.

[Brief explanation of the drawing]

Figure 1 A, B, and C are a front sectional view, side sectional view, and A-A sectional view showing an embodiment of the present invention; Figure 2 is a perspective view of an example of a paddle combination; Figure 3 A and B are horizontal 4 is a front sectional view of another embodiment; FIGS. 5A and 5B are front partial sectional views and plane sectional views of the conventional technology; FIGS. 6A and 6B are another conventional technique. FIG. 7 is a front view and a plan sectional view showing the technique of FIG. 1... Container, 3... Heat medium chamber, 4... Rotating shaft, 5
... Paddle, 6 ... Spiral shaft, 11 ... Supply port, 1
2...Discharge port, 13...Additive supply port, D...Feeding zone, E...Kneading retention zone, F...Kneading zone, G...Kneading feeding zone.

Claims (1)

[Scope of utility model registration request] A flat paddle having a lenticular or triangular cross section is provided in a vertical plane inside the container, and has two rotating shafts that are parallel to each other and have the same rotating direction and speed.
At least two or more types of helical paddles, which have the same cross section but are twisted 0 to 30 degrees around the rotation axis, and reverse helical paddles twisted in opposite directions, are combined to leave a small gap between the inner wall of the container and the paddles. engage and fit into the rotating shaft so as to be close to each other,
A material supply port is opened on either the top or bottom of the container, and a discharge port is opened on the other side, and the rotating shaft inside the supply port forms a spiral feeding zone. A kneading zone, a kneading feed zone by helical paddles, a kneading retention zone by combining a helical paddle and a reverse helical paddle, and any other zone by any combination of paddles are formed at any location and over any length, and A vertical processor characterized by having an additive supply port opening to a desired zone and a heating medium or cooling medium chamber surrounding the entire outer periphery of the container.