A multi-axis series devolatilization device

Abstract

The present application provides a multi-axis series devolatilization device, comprising: a first housing, on both sides of the upper part of the first housing along a first direction, a feed inlet and a discharge outlet are provided, and the first housing is used to accommodate devolatilization materials; a stirring mechanism, the stirring mechanism is arranged in the first accommodating cavity, the stirring mechanism includes at least two stirring shafts distributed along the first direction, the extending direction of the stirring shaft is a second direction, and the second direction is perpendicular to the first direction; at least one turntable is arranged on each stirring shaft along the second direction; a driving assembly, the driving assembly drives each stirring shaft to drive the turntables to rotate in the same direction, and the turntables generate a tangential driving force on the devolatilization materials, and push the devolatilization materials from the feed inlet to the discharge outlet; the flow direction of the present application is perpendicular to the extending direction of the stirring shaft, and the length of each stirring shaft does not need to be too long, and the residence time of the materials in the first accommodating cavity can be increased by increasing the number of stirring shafts; therefore, while meeting the devolatilization time of the materials, the present application also avoids the vibration generated at high speed.

Description

Technical Field

[0001] This application relates to the technical field of polymer devolatilization, and particularly relates to a multi-axis series devolatilization device. Background Art

[0002] There is an important purification step in polymer processing, in which unreacted monomers, a small amount of unremoved solvent, a small amount of oligomers, etc. in the polymer need to be removed. Generally, a horizontal self-cleaning devolatilizer is used. The polymer is heated to a molten state, and a vacuum is applied to volatilize small molecules, so that the polymer reaches a certain purity. Currently, most of the devolatilization processes use a multi-axis rotary disk cleaning device in parallel. The flow direction of the material is parallel to the extension line direction of the rotating shaft, and the discharge port is close to the tail end of the rotating shaft. Due to mechanical structure limitations, it is not easy to support the rotating shaft on the discharge port side. When the rotation speed is high, the rotating shaft is prone to vibration. Summary of the Invention

[0003] In view of the above defects or deficiencies in the prior art, this application aims to provide a multi-axis series devolatilization device, including:

[0004] A first housing, which has a first accommodation cavity therein. On both sides of the first housing along a first direction, there are a feed port and a discharge port communicating with the first accommodation cavity. The first accommodation cavity is used to accommodate devolatilization materials;

[0005] A stirring mechanism, which is arranged in the first accommodation cavity. The stirring mechanism includes at least two stirring shafts distributed along the first direction. The extending direction of the stirring shaft is a second direction, and the second direction is perpendicular to the first direction; at least one rotary disk is arranged on each stirring shaft along the second direction;

[0006] A driving component, which drives each stirring shaft to drive the rotary disks to rotate in the same direction. The rotary disks generate a tangential driving force on the devolatilization materials, and push the devolatilization materials from the feed port to the discharge port.

[0007] According to the technical solution provided by the embodiment of this application, the rotary disk includes two arc-shaped parts symmetrical about the stirring shaft. The opening of the arc-shaped part faces the other arc-shaped part, and the intersection point of the two arc-shaped parts abuts against the outer wall of the rotary disk corresponding to the adjacent stirring shaft; the extension lines of the center lines of the rotary disks corresponding to the adjacent stirring shafts are perpendicular.

[0008] According to the technical solution provided by the embodiment of this application, the axial direction of the discharge port is perpendicular to the first direction.

[0009] According to the technical solution provided by the embodiment of this application, on each stirring shaft, every two adjacent rotary disks are circumferentially offset by a set angle around the stirring shaft.

[0010] According to the technical solution provided by the embodiment of the present application, a plurality of the feed ports communicating with the first accommodation cavity are provided on the first housing.

[0011] According to the technical solution provided by the embodiment of the present application, an exhaust port communicating with the first accommodation cavity is provided at the top of the first housing, and the position of the exhaust port can be changed along the first direction.

[0012] According to the technical solution provided by the embodiment of the present application, outside the first housing, an air extraction assembly communicating with the exhaust port is provided, and the air extraction assembly is used to extract the devolatilization gas in the first accommodation cavity.

[0013] According to the technical solution provided by the embodiment of the present application, a temperature control assembly is further included, and the temperature control assembly is used to control the temperature in the first accommodation cavity.

[0014] According to the technical solution provided by the embodiment of the present application, a first container is provided outside the first housing, heating oil is provided in the first container, and the temperature control assembly is used to control the temperature of the heating oil.

[0015] According to the technical solution provided by the embodiment of the present application, the temperature control assembly can realize the zonal temperature control of the first accommodation cavity.

[0016] In summary, the present application provides a multi-axis series devolatilization device. By providing a first accommodation cavity for accommodating devolatilized materials in the first housing, and at least two stirring shafts distributed along the first direction in the first accommodation cavity, the extending direction of the stirring shafts is perpendicular to the first direction, and a plurality of turntables are provided along its length direction. A driving assembly for driving a plurality of stirring shafts to drive their rotating shafts to rotate in the same direction is further included. The turntables generate a tangential driving force on the devolatilized materials, so that the flowing direction of the devolatilized materials is perpendicular to the axial direction of the stirring shafts. In the prior art, the flowing direction of the materials is the same as the extending direction of the stirring shafts. In order to achieve the devolatilization effect, the stirring shafts need to be made long. If the stirring shafts are too long, they cannot rotate at high speed; while in the present application, the flowing direction is perpendicular to the extending direction of the stirring shafts, and the length of each stirring shaft does not need to be too long. The residence time of the materials in the first accommodation cavity can be increased by increasing the number of stirring shafts; therefore, while meeting the devolatilization time of the materials, the present application also avoids the vibration generated at high speed, which has very important significance for the improvement of the devolatilization device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a multi-axis series devolatilization device provided by an embodiment of the present application;

[0018] Figure 2 is a top view of a multi-axis series devolatilization device provided by an embodiment of the present application.

[0019] The text markings in the figure are indicated as:

[0020] 1. First housing; 11. First accommodating cavity; 12. Feed inlet; 13. Discharge outlet; 2. Stirring mechanism; 21. Stirring shaft; 22. Turntable; 221. Arc portion; 222. Junction point; 3. Devolatilized material; 4. First container; 41. Second housing; 42. Oil inlet; 43. Oil outlet. Detailed implementation manners

[0021] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0023] As mentioned in the background art, in view of the problems in the prior art, the present application proposes a multi-axis series devolatilization device, as Figure 1 shown, including:

[0024] A first housing 1, within which there is a first accommodating cavity 11. On both sides of the first housing 1 along a first direction, there are provided a feed inlet 12 and a discharge outlet 13 that communicate with the first accommodating cavity 11. The first accommodating cavity 11 is used to accommodate the devolatilized material 3; optionally, the first direction is the horizontal direction, the first housing 1 is a plurality of hollow cylindrical shapes, and two adjacent cylindrical shapes intersect; additionally, optionally, the axial direction of the feed inlet 12 is the horizontal direction;

[0025] A stirring mechanism 2, which is arranged within the first accommodating cavity 11. The stirring mechanism 2 includes at least two stirring shafts 21 distributed along the first direction. The extending direction of the stirring shaft 21 is a second direction, and the second direction is perpendicular to the first direction; along the second direction, there is at least one turntable 22 on each stirring shaft 21; optionally, as Figure 1 shown, the stirring mechanism 2 includes four stirring shafts 21, and the second direction is the length direction of the stirring shaft 21;

[0026] The driving assembly drives each of the stirring shafts 21 to drive the turntable 22 to rotate in the same direction. The turntable 22 generates a tangential driving force on the devolatilized material 3, and pushes the devolatilized material 3 from the feed inlet 12 to the discharge outlet 13. Among them, each of the stirring shafts 21 is independently driven, and each of the stirring shafts 21 is driven to rotate by a driving motor. Since the rotation of the stirring shaft 21 drives the flow of the devolatilized material 3 in the first accommodating cavity 11, the devolatilized material 3 does not fill the entire first accommodating cavity 11. In some specific scenarios, half of the material is contained in the first housing 1. The devolatilization effect of the devolatilized material 3 is related to the residence time in the first accommodating cavity 11. If the flow rate of the devolatilized material 3 is relatively fast, the number of the stirring shafts 21 can be increased. If the flow rate is relatively slow, the number of the stirring shafts 21 can be correspondingly reduced. In the present application, the flow direction of the devolatilized material 3 is perpendicular to the extending direction of the stirring shaft 21, and the length of each of the stirring shafts 21 does not need to be too long. The residence time of the devolatilized material 3 in the first accommodating cavity 11 can be increased by increasing the number of the stirring shafts 21. Therefore, while meeting the devolatilization time of the material, the present application also avoids the vibration generated at high speed, which has very important significance for the improvement of the devolatilization device.

[0027] Further, the turntable 22 includes two arc-shaped portions 221 symmetrical about the stirring shaft 21. The opening of the arc-shaped portion 221 faces the other arc-shaped portion 221, and the extension line of the center line of the turntable 22 corresponding to the adjacent stirring shafts 21 is perpendicular. Optionally, the shape of the turntable 22 is similar to an eye shape. In some specific scenarios, as Figure 2 shown, it includes four stirring shafts 21. Each of the stirring shafts 21 includes three turntables 22 arranged along its length direction. Two adjacent turntables 22 in each row of four turntables 22 are vertically arranged. If the feed inlet 12 is on the left and the discharge outlet 13 is on the right, the rotation direction of the stirring shaft 21 is counterclockwise. Therefore, when the turntable 22 rotates, it can drive the devolatilized material 3 on the side of the feed inlet 12 to flow towards the discharge outlet 13. It is possible that the turntable 22 brings the material back to the previous turntable 22, mixes with the devolatilized material 3 newly input from the feed inlet 12, completes secondary contact, and even reacts, thereby improving the devolatilization efficiency.

[0028] Further, the intersection point 222 of the two arc portions 221 abuts against the outer wall of the corresponding turntable 22 of the adjacent stirring shaft 21; specifically, the intersection points 222 at both ends of each turntable 22 abut against the turntables 22 on both sides, that is, the outer contour lines of the rotation of the turntables 22 are tangent to the outer walls of the adjacent turntables 22; when the devolatilized material 3 is a polymer, the viscosity of the polymer is relatively high and it will adhere to the outer wall of the turntable 22, and the rotation of the turntable 22 can scrape off the polymer on the outer wall of another adjacent turntable 22, realizing the self-scraping function; in addition, the shape of the turntable 22 is not limited to the eye shape, as long as the self-scraping function can be realized.

[0029] Further, on each stirring shaft 21, every two adjacent turntables 22 are circumferentially offset by a set angle around the stirring shaft 21; specifically, the turntables 22 on the same stirring shaft 21 are not necessarily perpendicular to each other, and they can be arranged in a spiral shape, but the adjacent turntables 22 of the adjacent stirring shafts 21 are perpendicular to each other.

[0030] Further, the first housing 1 is provided with a plurality of feed ports 12 communicating with the first accommodation cavity 11; wherein, if the devolatilization device is used to mix and react two different devolatilized materials 3, a plurality of feed ports 12 for conveying different devolatilized materials 3 can be provided to realize the reaction of different devolatilized materials 3 in the first accommodation cavity 11; in addition, the rotation of the turntable 22 can drive the devolatilized material 3 to react again with the previous material, improving the reaction efficiency.

[0031] Embodiment 2

[0032] On the basis of Embodiment 1, further, an exhaust port 14 communicating with the first accommodation cavity 11 is provided at the top of the first housing 1, and the position of the exhaust port 14 can be changed along the first direction; wherein, since the evaporation point of high molecules is very high and the evaporation point of low molecules is relatively low, at high temperatures, low molecules can be formed into gases, removed from the polymer, and discharged through the exhaust port 14. Due to different exhaust capabilities, the position of the exhaust port 14 can be changed. If degassing starts at the beginning, the exhaust port 14 is arranged near the left side, and if degassing is carried out later, it can be arranged near the right side.

[0033] Further, outside the first housing 1, an air extraction assembly communicating with the exhaust port 14 is provided, and the air extraction assembly is used to extract the devolatilized gas in the first accommodation cavity 11; optionally, the air extraction assembly is a vacuum pump, and the vacuum pump is communicated with the exhaust port 14. Through the vacuum pump, the small molecule gas in the first accommodation cavity 11 can be pumped out faster.

[0034] Further, it further includes a temperature control component for controlling the temperature inside the first accommodation cavity 11. Since devolatilization is carried out at high temperatures and different devolatilization effects need to be achieved, this devolatilization device must have a temperature control function, and the temperature control method is not limited. Optionally, a heat exchange tube can be wound around the outside of the first housing 1, and the temperature inside the first housing 1 can be controlled by introducing gases with different temperatures into the heat exchange tube. Additionally, optionally, a first container 4 is provided outside the first housing 1, and heating oil is provided inside the first container 4. The temperature control component is used to control the temperature of the heating oil. Specifically, the first container 4 includes a second housing 41, a second accommodation cavity 42 is formed inside the second housing 41, an oil inlet 43 and an oil outlet 44 communicating with the second accommodation cavity 42 are provided on the second housing 41, and the second accommodation cavity 42 is used to accommodate the heating oil, that is, heating can also be carried out by an oil bath method, and the temperature inside the first housing 1 can be controlled by controlling the temperature of the heating oil.

[0035] Further, the temperature control component can achieve zoned temperature control of the first accommodation cavity 11. Optionally, outside the first housing 1, a plurality of independently temperature-controlled heat exchange tubes can be wound in the areas corresponding to different stirring shafts 21; or the first container 4 can be partitioned by a partition in the areas corresponding to the stirring shafts 21, and the heating oil in each area of each first container 4 can reach different temperatures under the control of different temperature control components, thereby achieving zoned temperature control. Therefore, this application is relatively flexible and easier to control.

[0036] In this article, specific examples are used to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. The above is only the preferred implementation manner of this application. It should be noted that due to the limited nature of written expression and the objectively infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of this invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of this application.

Claims

1. A multi-axis series devolatilization device, characterized in that, Comprising: A first housing (1), within which there is a first accommodation cavity (11). On both sides of the first housing (1), there are a feed inlet (12) and a discharge outlet (13) that communicate with the first accommodation cavity (11). The feed inlet (12) and the discharge outlet (13) are arranged along a first direction. The first accommodation cavity (11) is used to accommodate the devolatilization material (3); the devolatilization material (3) does not fill the entire first accommodation cavity (11). A stirring mechanism (2), which is arranged within the first accommodation cavity (11). The stirring mechanism (2) includes at least two stirring shafts (21) distributed along the first direction. The extending direction of the stirring shaft (21) is a second direction, and the second direction is perpendicular to the first direction; along the second direction, there is at least one turntable (22) on each stirring shaft (21); on each stirring shaft (21), every two adjacent turntables (22) are circumferentially offset by a set angle around the stirring shaft (21). A driving assembly, which drives each stirring shaft (21) to drive the turntables (22) to rotate in the same direction. The turntables (22) generate a tangential driving force on the devolatilization material (3), and push the devolatilization material (3) from the feed inlet (12) to the discharge outlet (13); the flowing direction of the devolatilization material (3) is perpendicular to the extending direction of the stirring shaft (21). At the top of the first housing (1), there is an exhaust port (14) that communicates with the first accommodation cavity (11), and the exhaust port (14) can change its position along the first direction. It further includes a temperature control assembly, which is used to control the temperature within the first accommodation cavity (11); the temperature control assembly can achieve zonal temperature control of the first accommodation cavity (11).

2. The multi-axis series devolatilization device according to claim 1, wherein: The turntable (22) includes two arc-shaped parts (221) that are symmetric about the stirring shaft (21). The openings of the arc-shaped parts (221) face each other, and the extension lines of the centerlines of the turntables (22) corresponding to adjacent stirring shafts (21) are perpendicular.

3. The multi-axis series devolatilization device according to claim 2, wherein: The intersection point (222) of the two arc-shaped parts (221) abuts against the outer wall of the turntable (22) corresponding to the adjacent stirring shaft (21).

4. The multi-axis series devolatilization device according to claim 1, wherein: There are multiple feed inlets (12) on the first housing (1) that communicate with the first accommodation cavity (11).

5. The multi-axis series devolatilization device according to claim 1, wherein: Outside the first housing (1), there is an air extraction assembly that communicates with the exhaust port (14), and the air extraction assembly is used to extract the devolatilization gas within the first accommodation cavity (11).

6. The multi-axis series devolatilization device according to claim 1, wherein: Outside the first housing (1), there is a first container (4), within which there is heating oil, and the temperature control assembly is used to control the temperature of the heating oil.

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