PPTA polymer defoaming device

Abstract

The utility model provides a PPTA polymer defoaming device. The PPTA polymer defoaming device comprises a conical shell; the feeding hole is formed in the top of the shell; the discharging opening is formed in the bottom of the shell; the driving motor is arranged in the center of the top of the shell; the rotating shaft is connected with the output end of the driving motor and extends to the discharge port; the outer spiral cutter is mounted on the rotating shaft through a support frame; the inner spiral cutter is arranged along the surface of the rotating shaft; the triangular scraper and the comb-shaped scraper are symmetrically arranged at the bottom of the rotating shaft. According to the defoaming device, the inner spiral cutter opposite to the outer spiral cutter in rotation direction is arranged along the surface of the rotating shaft, so that materials near the rotating shaft are driven to move from the top to the bottom while stirring of the materials near the rotating shaft is completed, and the materials form a circulation path; meanwhile, a triangular scraper and a comb-shaped scraper which are higher in stirring efficiency are additionally arranged at the bottom end of the defoaming device, so that the problem that the stirring effect of a helical ribbon on a conical defoaming machine on materials near a central axis is gradually reduced along with the rising of a horizontal plane in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of degassing devices, in particular to a PPTA polymer degassing device. Background Art

[0002] The PPTA (para-aramid polymer, also known as poly(p-phenylene terephthalamide)) polymer degassing device is one of the key equipment in the aramid fiber production process. It is mainly used to remove bubbles in the spinning solution formed after the PPTA polymer is dissolved in solvents such as concentrated sulfuric acid to ensure the stability of the spinning process and the quality of the fiber.

[0003] In the prior art, the conical deaerator drives the double conical spiral ribbons to rotate together through the rotating shaft to stir the liquid in the conical stirring tank. Under the stirring action of the spiral ribbon, the liquid continuously rolls up and down. The bubbles formed during the stirring process rise to the liquid surface under the action of buoyancy, or are brought to the vicinity of the liquid surface when the liquid rolls. The bubbles escape from the liquid under the action of vacuum, obtaining a vacuum stirring and deaeration treatment, thereby completing the third deaeration of the liquid.

[0004] However, in this degassing method, since the spiral ribbon is arranged along the inner wall of the shell and the width of the spiral ribbon is fixed, as the horizontal plane continues to rise, the spiral ribbon is farther away from the central axis of the shell. Therefore, the stirring effect of the spiral ribbon on the material near the central axis gradually decreases as the horizontal plane rises, and it is difficult to drive the material near the central axis to roll up and down. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that the stirring effect of the spiral ribbon on the material near the central axis gradually decreases as the horizontal plane rises.

[0006] In order to achieve the above-mentioned purpose, the present application proposes a PPTA polymer degassing device, comprising: a conical shell; a feed port arranged at the top of the conical shell; a discharge port arranged at the bottom of the conical shell; a drive motor arranged at the center of the top of the conical shell; a rotating shaft connected to the output end of the drive motor and extending to the discharge port; an outer spiral knife mounted on the rotating shaft through a support frame; it is characterized in that the inner spiral knife is arranged along the surface of the rotating shaft; and a triangular scraper and a comb-shaped scraper are symmetrically arranged at the bottom of the rotating shaft.

[0007] The deaeration device of the present application, by arranging an inner spiral blade along the surface of the rotating shaft in the opposite direction of rotation to the outer spiral blade, completes the stirring of the material near the rotating shaft, and drives the material near the rotating shaft to move from top to bottom, forming a closed circulation path with the material moving upward along the outer spiral blade, and at the same time, a triangular scraper and a comb-shaped scraper with higher stirring efficiency are added to the bottom end of the deaeration device, which solves the problem in the prior art that the stirring effect of the spiral ribbon on the material near the central axis gradually decreases as the horizontal plane rises.

[0008] As an improvement of the above-mentioned feed part of the present application, in order to make the material enter the device evenly along the inner wall of the conical shell, the feed part includes: a main feed port arranged at the top of the outer wall of the conical shell; a distribution coil connected to the main feed port and close to the top of the inner wall of the conical shell; and feed distribution ports arranged in a ring shape at the bottom end of the distribution coil.

[0009] As an improvement to the above-mentioned inner spiral cutter of the present application, in order to form a circulation path between the material near the inner spiral cutter and the material near the outer spiral cutter, the spiral direction of the inner spiral cutter is opposite to that of the outer spiral cutter.

[0010] Furthermore, in order to enable the material driven by the inner spiral knife to achieve secondary degassing, the end of the inner spiral knife is welded to the upper surface of the largest tooth of the comb-shaped scraper.

[0011] As an improvement of the above-mentioned triangular scraper of the present application, in order to further enhance the degassing effect, the bevel edge of the triangular scraper is set to be angular.

[0012] Furthermore, in order to ensure the scraping effect while avoiding wear of the triangular scraper, there is a gap of 10 mm to 20 mm between the edge of the triangular scraper and the inner wall of the conical shell.

[0013] As an improvement to the comb-shaped scraper mentioned above in the present application, in order to further enhance the degassing effect, the end of the comb-shaped scraper away from the rotating shaft is configured to be angular.

[0014] Furthermore, to avoid wear of the comb-shaped scraper, the tooth shape of the comb-shaped scraper decreases from the top to the bottom end according to the inner wall of the conical shell, and there is a gap of 10mm to 20mm between the angular end of the comb-shaped scraper and the inner wall of the conical shell.

[0015] The beneficial effects of this application are:

[0016] 1. The deaeration device of the present application, by arranging an inner spiral blade along the surface of the rotating shaft in the opposite direction of rotation to the outer spiral blade, completes the stirring of the material near the rotating shaft, and drives the material near the rotating shaft to move from top to bottom, forming a closed circulation path with the material moving upward along the outer spiral blade, and at the same time, a triangular scraper and a comb-shaped scraper with higher stirring efficiency are added to the bottom end of the deaeration device, which solves the problem in the prior art that the stirring effect of the spiral ribbon on the material near the central axis gradually decreases as the horizontal plane rises.

[0017] 2. In the present application, triangular scrapers and comb-shaped scrapers are symmetrically arranged at a position near the bottom end of the degassing device on the rotating shaft. The triangular scraper is mainly used to promote the movement of viscous materials, which can effectively reduce the resistance of the comb-shaped scraper caused by the viscous material during rotation, thereby reducing the wear of the comb-shaped scraper; and the comb-shaped scraper can penetrate deep into the polymer during rotation, allowing the material to pass through the gaps between the teeth, effectively scraping off the bubbles inside the material. At the same time, the racks of the comb-shaped scraper are gradually shortened from top to bottom, realizing gradually refined scraping from top to bottom, ensuring the comprehensiveness and thoroughness of degassing.

[0018] 3. The parts of the triangular scraper and the comb scraper close to the inner wall of the conical shell are set to an angular shape, which can ensure that the material is effectively degassed when it moves from the bottom to the top in the initial stage, that is, in the initial stage of upward movement driven by the outer spiral blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a PPTA polymer degassing device in an embodiment of the present application;

[0021] Description of reference numerals:

[0022] 1. Conical shell; 2. Feed part; 21. Main feed port; 22. Distribution coil; 23. Feed distribution port; 3. Discharge port; 4. Drive motor; 5. Rotating shaft; 6. Support frame; 7. External spiral blade; 8. Internal spiral blade; 9. Triangular scraper; 10. Comb scraper. DETAILED DESCRIPTION

[0023] The following will be combined with the Figure 1The embodiments of the technical solution of the present application are described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application. In addition, the technical features involved in the various embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

[0024] like Figure 1 A PPTA polymer degassing device of the present application is illustrated, which includes: a conical shell 1; a feed port 2 arranged at the top of the conical shell 1; a discharge port 3 arranged at the bottom of the conical shell 1; a drive motor 4 arranged at the center of the top of the conical shell 1; a rotating shaft 5 connected to the output end of the drive motor 4 and extending to the discharge port 3; an outer spiral blade 7 mounted on the rotating shaft 5 through a support frame 6; it is characterized in that it includes an inner spiral blade 8 arranged along the surface of the rotating shaft 5; and a triangular scraper 9 and a comb-shaped scraper 10 symmetrically arranged at the bottom of the rotating shaft 5.

[0025] In one embodiment of the present application, a conical housing 1 provides space for stirring the viscous material. A feed port 2 is located at the top of the housing 1 for injecting the PPTA polymer solution to be degassed into the device, and a discharge port 3 is located at the bottom for discharging the degassed polymer solution. A drive motor 4 is mounted at the center of the top of the housing 1. The motor's output terminal is connected to a rotating shaft 5 extending to the discharge port 3, providing power for the entire degassed process.

[0026] In the prior art, since the spiral ribbon is arranged along the inner wall of the shell and the width of the spiral ribbon is constant, as the horizontal plane continues to rise, the spiral ribbon is farther away from the central axis of the shell. Therefore, the stirring effect of the spiral ribbon on the material near the central axis gradually decreases as the horizontal plane rises, and it is difficult to drive the material near the central axis to roll up and down.

[0027] In one embodiment of the present application, an outer spiral blade 7 is mounted on the rotating shaft 5 via a support frame 6. The outer spiral blade rotates along the inner wall of the conical outer shell 1, driving the polymer solution to move from the bottom to the top. In order to enhance the stirring effect on the material near the rotating shaft 5, the present invention particularly arranges an inner spiral blade 8 along the surface of the rotating shaft 5, and its spiral direction is opposite to that of the outer spiral blade 7. This design enables the inner spiral blade 8 to drive the material near the rotating shaft from the top to the bottom when rotating, forming a closed circulation path with the material driven by the outer spiral blade 7, thereby solving the problem of the weakened stirring effect of the spiral ribbon on the material near the central axis in the traditional conical degassing machine.

[0028] Continue to refer to Figure 1In a further embodiment, the feed section 2 includes: a main feed port 21 disposed at the top of the outer wall of the conical housing 1; a feed distribution coil 22 connected to the main feed port 21 and in close contact with the top of the inner wall of the conical housing 1; and feed branch ports 23 arranged in an annular pattern at the bottom of the feed distribution coil 22. Specifically, the material first enters the feed distribution coil 22 through the main feed port 21, then flows into the device through the feed branch ports 23 at the bottom of the feed distribution coil 22, forming several small streams. For viscous materials that are prone to agglomeration, the branching process can reduce material agglomeration during the conveying and mixing process, making the material more delicate and uniform.

[0029] To further enhance degassing, the present invention symmetrically arranges triangular scrapers 9 and comb-shaped scrapers 10 at the bottom of the rotating shaft 5. The beveled edges of the triangular scrapers 9 are designed to be angular, enhancing their ability to push viscous materials and reducing the resistance experienced by the comb-shaped scrapers during rotation. Furthermore, to ensure effective scraping and prevent excessive wear, a clearance of 10 to 20 mm is maintained between the edges of the triangular scrapers 9 and the inner wall of the conical housing 1.

[0030] Continue to refer to Figure 1 In a further embodiment, the end of the comb-shaped scraper 10 facing away from the rotating shaft 5 is also angular to better scrape bubbles from the material. The tooth profile of the comb-shaped scraper gradually decreases from top to bottom, following the shape of the inner wall of the conical shell 1. This design allows the comb-shaped scraper to penetrate deep into the polymer during rotation, while achieving gradually finer scraping from top to bottom, ensuring comprehensive and thorough degassing. In addition, the angular end of the comb-shaped scraper also maintains a gap of 10mm to 20mm from the inner wall of the conical shell 1 to reduce wear.

[0031] During the specific operation, the PPTA polymer solution is injected into the conical shell 1 through the feed port 2. After the drive motor 4 is started, it drives the rotating shaft 5 and the outer spiral blade 7, inner spiral blade 8, triangular scraper 9 and comb-shaped scraper 10 installed thereon to rotate together. The outer spiral blade 7 carries the polymer solution from the bottom to the top, while the inner spiral blade 8 does the opposite, carrying the material near the rotating shaft to the bottom, forming a closed loop. The triangular scraper 9 and comb-shaped scraper 10 efficiently stir and scrape the material at the bottom, promoting the rupture and discharge of bubbles. Finally, the deaerated PPTA polymer solution is discharged through the discharge port 3, completing the entire deaeration process.

[0032] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "upper", "lower", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0033] In the description of the embodiments of this application, unless otherwise specified or limited, technical terms such as "disposed," "equipped with," "connected," and "installed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; they can be directly connected or indirectly connected through an intermediate medium. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this application based on specific circumstances.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PPTA polymer degassing device, comprising: Conical housing (1); A feed portion (2) disposed on the top of the conical housing (1); A discharge port (3) is provided at the bottom of the conical housing (1); a driving motor (4) is provided at the center of the top of the conical housing (1); a rotating shaft (5) connected to the output end of the driving motor (4) and extending to the discharge port (3); an outer spiral cutter (7) is mounted on the rotating shaft (5) through a support frame (6); and the inner spiral cutter (8) is arranged along the surface of the rotating shaft (5); and a triangular scraper (9) and a comb-shaped scraper (10) are symmetrically arranged at the bottom of the rotating shaft (5).

2. The degassing device according to claim 1, characterized in that The feed portion (2) comprises: a main feed port (21) arranged at the top of the outer wall of the conical shell (1); a distribution coil (22) connected to the main feed port (21) and closely attached to the top of the inner wall of the conical shell (1); and a feed distribution port (23) arranged in an annular manner at the bottom end of the distribution coil (22).

3. The degassing device according to claim 1, wherein The spiral direction of the inner spiral blade (8) is opposite to that of the outer spiral blade (7).

4. The degassing device according to claim 1, wherein The end of the inner spiral blade (8) is welded to the upper surface of the largest tooth of the comb-shaped scraper (10).

5. The degassing device according to claim 1, wherein The oblique edge of the triangular scraper (9) is configured to be angular.

6. The degassing device according to claim 5, characterized in that There is a gap of 10 mm to 20 mm between the edge of the triangular scraper (9) and the inner wall of the conical shell (1).

7. The degassing device according to claim 1, wherein The end of the comb-shaped scraper (10) facing away from the rotating shaft (5) is configured to be angular.

8. The degassing device according to claim 7, characterized in that The tooth shape of the comb-shaped scraper (10) follows the inner wall of the conical shell (1), and the tooth length decreases from the top to the bottom. At the same time, there is a gap of 10 mm to 20 mm between the angular end of the comb-shaped scraper (10) and the inner wall of the conical shell (1).

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