A devolatilization apparatus

Abstract

The application provides a devolatilization device, which comprises a devolatilization device tank body and a multistage tray arranged in an inner cavity of the devolatilization device tank body, wherein the tray is provided with inner ring trays and outer ring trays which are alternately and intervally arranged, the outer diameter of the inner ring tray is greater than the inner diameter of the outer ring tray located at the lower end of the inner ring tray, devolatilization is carried out by using the multistage tray, so that multistage devolatilization is realized; the inner ring trays and the outer ring trays are alternately and intervally arranged, so that the material flows in a return mode, the process is further increased, and the devolatilization efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of polymer devolvation technology, specifically relating to a devolvation device. Background Technology

[0002] Polymer devolatiles removal is a process of separating low molecular weight components from a polymer system. These low molecular weight components include unreacted monomers, solvents, and various polymerization byproducts, collectively referred to as volatiles, which frequently need to be removed from the polymer. With increasing demands for user experience and environmental protection, the requirements for volatile removal are becoming increasingly stringent.

[0003] Currently, various types of devolatilizers are operating in industrial plants. For example, while in-tube falling film or downward flow liquid column (droplet) devolatilizers can provide a large gas-liquid cross-section, their devolatilization efficiency may be affected by insufficient devolatilization time.

[0004] Therefore, there is an urgent need to develop a device for removing volatiles from polymers that can achieve efficient removal of volatiles. Summary of the Invention

[0005] To address some or all of the aforementioned technical problems in the prior art, a volatilization removal device is provided. This volatilization removal device has multi-stage trays, enabling multi-stage volatilization, and can adjust and control the residence time of the material to improve volatilization efficiency.

[0006] According to the present invention, the proposed technical solution is as follows:

[0007] A devolatile matter removal device, comprising:

[0008] The tank of the volatile matter removal unit,

[0009] The multi-stage trays are arranged in the inner cavity of the devolatile matter tank, and the trays have alternating and spaced inner ring trays and outer ring trays. The outer diameter of the inner ring tray is larger than the inner diameter of the outer ring tray located at its lower end.

[0010] In one embodiment, the tray further includes a stirring assembly having a drive member, a transmission shaft connected to the output shaft of the drive member, and stirring blades sleeved on the transmission shaft, the stirring blades being disposed on at least a portion of the upper surface of the tray.

[0011] In one embodiment, the stirring blades are spaced apart from the upper surface of the corresponding tray.

[0012] In one embodiment, the extension plane of the stirring blade is perpendicular to the upper surface of the tray, and comb teeth are provided at the lower end of the stirring blade.

[0013] In one embodiment, the drive shaft extends axially upward through the top wall of the devolatile matter tank, and all the stirring blades are connected to the drive shaft.

[0014] In one embodiment, the outer diameter of the inner annular tray is between 70-95% of the inner diameter of the devolatile matter tank, the inner diameter of the outer annular tray is between 20-50% of the inner diameter of the devolatile matter tank, and the radial overlap dimension between adjacent inner and outer annular trays is at least 5% of the inner diameter of the devolatile matter tank.

[0015] In one embodiment, both the inner and outer annular trays are constructed as hollow trays, and heating channels are wound around the hollow trays, with the heating channels connected to a heating source.

[0016] In one embodiment, a plurality of circumferentially extending intercepting rings are provided protrudingly on the upper surface of the tray, and each intercepting ring is provided with a plurality of axially spaced notches for disconnecting the intercepting ring.

[0017] In one embodiment, the height of each interception ring is 2-3 mm.

[0018] In one embodiment, at least part of the outer ring tray is tilted, and the tilt angle of the outer ring tray does not decrease in the top-to-bottom direction.

[0019] Compared with the prior art, the advantages of the present invention are: multi-stage trays are used for devolatilization, thereby realizing multi-stage devolatilization; furthermore, the trays are arranged in an alternating manner between inner and outer trays, which makes the material flow back and forth, further increasing the process and improving the devolatilization efficiency. Attached Figure Description

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which:

[0021] Figure 1 The devolatile matter removal device of the first embodiment of the present invention is shown schematically;

[0022] Figure 2 The devolatile matter removal device of the second embodiment of the present invention is illustrated schematically;

[0023] Figure 3 The devolatile matter removal device of the third embodiment of the present invention is illustrated schematically;

[0024] Figure 4 The diagram schematically shows a cross-sectional view of the trays of a devolatile matter removal device according to an embodiment of the present invention;

[0025] Figure 5A top view of the trays of a devolatile fractionation apparatus according to an embodiment of the present invention is shown;

[0026] Figures 6a-6c The schematic diagram shows the stirring blades of a volatilization removal device according to an embodiment of the present invention;

[0027] Figure 7 For from Figure 6a A schematic diagram of direction A.

[0028] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0029] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0030] This application provides a device for removing volatiles. For example... Figure 1 As shown, the volatile matter removal unit includes a volatile matter removal unit tank 1 and trays 2. The trays 2 are disposed within the inner cavity of the volatile matter removal unit tank 1 and are spaced apart vertically. The trays 2 include an inner ring tray 21 and an outer ring tray 22, which are arranged alternately. The inner ring tray 21 has a gap between its outer diameter and the wall of the volatile matter removal unit tank 1. The outer ring tray 22 is annular, with its outer diameter abutting against the wall of the volatile matter removal unit tank 1, while its inner diameter forms a vertically communicating hole. The outer diameter of the inner ring tray 21 is larger than the inner diameter of the outer ring tray 22 located at its lower end.

[0031] The devolatile matter removal unit of this application adopts a multi-stage configuration, enabling multi-stage devolatile matter removal within a single tank 1, thus ensuring high devolatile matter removal efficiency. Simultaneously, this compact structure avoids material transport between stages and reduces land occupation issues during construction. The trays 2 feature alternating inner and outer trays, allowing for a reciprocating flow of material, further increasing the flow path and improving devolatile matter removal efficiency.

[0032] In one embodiment, the volatilization removal device further includes a stirring assembly. The stirring assembly has a drive element 31, a transmission shaft 32 connected to the output shaft of the drive element 31, and stirring blades 33 sleeved on the transmission shaft 32. The stirring blades 33 are disposed on at least a portion of the upper surface of the tray 2. By providing the stirring assembly, the drive element 31 drives the transmission shaft 32 to rotate, which in turn drives the stirring blades 33 to rotate, thereby causing the material on the corresponding tray 2 to form a film, resulting in high volatilization efficiency. Furthermore, in the presence of the stirring assembly, high-viscosity fluids can easily flow between different stages. Additionally, in this application, the drive element 31 can be a motor, disposed outside the volatilization removal device tank 1, facilitating control, maintenance, and replacement. The transmission shaft 32 extends axially along the volatilization removal device tank 1, driving multiple stirring blades 33 to rotate. That is, the transmission shaft 32 extends axially upward through the top wall of the volatilization removal device tank 1, and all stirring blades 33 are connected to the transmission shaft 32. This setup does not require a high-power drive unit 31, and the equipment is simple to manufacture, with much lower investment and operating costs. Since the stirring only achieves the mixing and conveying of materials, the shear force generated by the low-speed stirring is negligible and will not cause material degradation or decomposition. It is easy to understand that the drive shaft 32 passes intermittently through the inner ring tray 21.

[0033] The stirring blades 33 are spaced apart from the upper surface of the corresponding tray 2. For example, the distance between the stirring blades 33 and the upper surface of the corresponding tray 2 is 5-50 mm. The distance between the stirring blades 33 and the tray 2 can be adjusted according to the different viscosities of the material. For example, the lower the fluidity of the material, the greater the distance between them can be.

[0034] The extended plane of the stirring blade 33 is perpendicular to the upper surface of the tray 2. For example... Figure 7 As shown, comb teeth 34 are provided at the lower end of the stirring blade 33. Each comb tooth 34 is tooth-shaped, for example, elongated, and extends towards the tray 2. By providing comb teeth 34, the comb teeth 34 can be inserted into the material to a certain extent, thereby improving the devolatilization efficiency. In addition, the stirring blade 33 of this application can be... Figures 6a to 6c As shown, the top view of each stirring blade 33 can be straight, curved, or segmented. Among them, the stirring blades 33 of 6a and 6b are suitable for the inner annular tray 21, while... Figure 6c The stirring blades 33 are suitable for the outer ring tray 22.

[0035] The outer diameter of the inner annular tray 21 is between 70% and 95% of the inner diameter of the volatile matter removal unit tank 1. The inner diameter of the outer annular tray 22 is between 20% and 50% of the inner diameter of the volatile matter removal unit tank 1. Furthermore, the radial overlap dimension of adjacent inner annular trays 21 and outer annular trays 22 is at least 5% of the inner diameter of the volatile matter removal unit tank 1. The above configuration optimizes the structure of the trays 2 themselves and the combined structure of the trays 2, allowing the material to fall from the outer edge of the inner annular tray 21 onto the outer annular tray 22, and then from the inner edge of the outer annular tray 22 onto the next-level inner annular tray 21.

[0036] like Figure 4 As shown, both the inner annular tray 21 and the outer annular tray 22 are constructed as hollow trays. Heating channels 4 are wound around the hollow trays. The heating channels 4 are connected to a heating source (not shown in the figure). For example, the heating source can be a liquid medium located outside the tray 2. The heated liquid enters through one end of the heating channel 4 and flows out through the other end, circulating through the inner cavity of the tray 2 in a spiral manner, thereby heating the tray 2. This type of tray 2, with a heating medium circulating inside, has a large heating area, achieving the removal target effectively without requiring a large temperature difference, and can also greatly reduce the degradation or decomposition of materials.

[0037] like Figure 5 As shown, multiple intercepting rings 23 are protruding from the upper surface of the tray 2, with intercepting rings 23 of different diameters nested together. The height of each intercepting ring 23 is 2-3 mm. It should be explained that the 5-50 mm distance between the stirring blade 33 and the corresponding upper surface of the tray 2 mentioned above refers to the distance between the lower end face 35 of the stirring blade 33 and the surface of the tray 2 outside the intercepting rings 23. The intercepting rings 23 are provided with notches 24 for disconnecting them. Preferably, on the one hand, by setting the intercepting rings 23 and the notches 24, the flow rate of the material can be appropriately increased, improving the volatilization effect; on the other hand, the setting of the intercepting rings 23 can increase the heating area, improve heating efficiency, and further increase the removal efficiency; furthermore, the above-mentioned arrangement can apply appropriate shear force to the material, thereby reducing the viscosity of the material, which is conducive to the removal of volatiles.

[0038] In one embodiment, at least part of the outer annular tray 22 is inclined. Understandably, this inclination is lower on the inside and higher on the outside, allowing material to flow from the outer annular tray 22 to the lower tray 2. Furthermore, within the same volatilization unit tank 1, the inclination angle of the outer annular tray 22 does not decrease from top to bottom; that is, the inclination angle of the outer annular tray 22 remains constant or increases. For example, the inclination angle of the outer annular tray 22 (the angle between the extending direction and the horizontal direction) is 0-60°. This arrangement improves the applicability of the volatilization unit to better accommodate changes in material viscosity.

[0039] In this application, the number of trays 2 can be multiple, such as 2-10. Furthermore, the distance between adjacent trays 2 is 600-2000 mm. The specific number of trays and spacing can be adjusted according to actual circumstances.

[0040] In this application, the specific configuration of tray 2 can be selected based on the flow characteristics of the incoming material. For example, when the volatile matter extractor is used with a material that has good flowability, both the inner ring tray 21 and the outer ring tray 22 of tray 2 can be without a stirring assembly. As the flowability decreases, the following configurations can be selected sequentially: a horizontal inner ring tray 21 without a stirring assembly, and an inclined outer ring tray 22 without a stirring assembly; a horizontal inner ring tray 21 with a stirring assembly, and a horizontal outer ring tray 22 with a stirring assembly; a horizontal inner ring tray 21 with a stirring assembly, and a small-angle inclined outer ring tray 22 with a stirring assembly; a horizontal inner ring tray 21 with a stirring assembly, and a large-angle inclined outer ring tray 22 with a stirring assembly; and an inclined inner ring tray 21 with a stirring assembly, and a large-angle inclined outer ring tray 22 with a stirring assembly. Therefore, it can be seen that setting a stirring assembly and increasing the inclination angle of tray 2 are more suitable for materials with poor flowability. In different applications, the combination of tray 2 varies due to differences in the flowability of the incoming material. The combination of tray 2 also differs between different stages of the same equipment, and the tilt angle changes with increasing viscosity and flowability. In a specific example, when the viscosity of the material is 100-20000 cp, the selected outer ring tray 22 can be a flat tray without a stirring component. When the viscosity is 10000-200000 cp, the selected outer ring tray 22 can be a flat tray with a stirring component. When the viscosity is greater than 200000 cp, the selected outer ring tray 22 can be tilted and has a stirring component, and the tilt angle of the outer ring tray 22 increases with increasing viscosity. Understandably, when the viscosity is between 10000-20000 cp, either the first or second setting can be used.

[0041] The volatile matter removal device also includes a feed inlet 11 on the top wall of the volatile matter removal device tank 1, a discharge outlet 12 on the bottom wall of the volatile matter removal device tank 1, and a volatile matter outlet 13 on the top wall of the volatile matter removal device tank 1. A distributor (not shown in the figure) may also be provided at the lower end of the feed inlet 11 to distribute the feed onto the tray 2 of the first layer.

[0042] In addition, both the inner annular tray 21 and the outer annular tray 22 are fixedly connected to the wall of the volatile matter removal unit tank 1. A heating channel 4 is also coiled around the wall of the volatile matter removal unit tank 1 to heat the entire volatile matter removal unit tank 1, so as to maintain the internal temperature, promote the volatilization of volatiles, and prevent the volatilized volatiles from condensing on the wall surface.

[0043] This application Figures 1 to 3 Several specific embodiments are provided in the document.

[0044] Example 1.

[0045] like Figure 1 As shown, the first-stage inner ring tray 21 is a stirless tray 2, with an outer diameter that is 95% of the inner diameter of the devolatiles removal unit tank 1. In the low-viscosity region of the feed, the liquid can flow by itself. A cavity is provided inside the tray 2, and a heating medium is conveyed within the cavity through a heating channel 4. The polymer containing the liquid is heated during the flow, and the volatiles evaporate into the gas phase space, finally flowing out of the inner cavity of the devolatiles removal unit tank 1 from the volatiles outlet 13.

[0046] The secondary outer ring tray 22 is inclined at an angle of 15°, and its inner diameter is 20% of the diameter of the volatile matter removal unit tank 1.

[0047] During operation, the material in the primary inner ring tray 21 falls freely to the periphery of the secondary outer ring tray 22. Under gravity, it then converges inwards, and during this flow, it is heated by the heating channel 4 within the tray 2, achieving the purpose of removing volatiles. The axial distance between the primary inner ring tray 21 and the secondary outer ring tray 22 is 600 mm. This axial distance refers to the axial dimension from the fixed point of the primary inner ring tray 21 to the fixed point (outer edge) of the secondary outer ring tray 22.

[0048] The third-stage horizontal inner ring tray 21 is equipped with stirring blades 33. The outer diameter of this tray 2 is 90% of the diameter of the volatile matter removal unit tank 1, and the distance between it and the upper tray 2 is 1200 mm. The distance between the stirring blades 33 and the tray 2 is 3 mm, and the rotation speed of the stirring blades 33 is adjustable from 20 to 50 revolutions per minute. The stirring blades 33 promote the mixing of the liquid on the tray 2. The liquid is heated through the heating channel 4 inside the tray 2, and the film formed by stirring is very easy for volatiles to enter the gas phase from the liquid phase. At the same time, with the assistance of the stirring blades 33 and the fluid flow, the material is conveyed to the periphery of the tray 2 and falls onto the next tray 2.

[0049] The fourth stage consists of a horizontal outer ring tray 22 with stirring blades 33. The inner diameter of the horizontal tray 2 is 30% of the inner diameter of the volatile matter removal unit tank 1, and the distance between it and the upper tray 2 is 1200 mm. The distance between the stirring blades 33 and the upper surface of the tray 2 is 5 mm, and the stirring speed is adjustable from 20 to 50 revolutions per minute. Stirring promotes the mixing of the liquid on the tray 2, heat transfer between the liquid and the heating medium in the tray 2, and the film formed by stirring facilitates the volatiles to enter the gas phase from the liquid phase. Under the action of the stirring components, the material is transported to the central area of ​​the tray 2 and falls onto the next tray 2.

[0050] The trays 2 for further stages can be set up with reference to the trays 2 for the third and fourth stages. It should be noted that the inclination angle of the outer ring tray 22 of the lower stage can be appropriately increased compared to the outer ring tray 22 of the upper stage to accommodate the gradual increase in material viscosity.

[0051] Bottom outlet 12 is located at the bottom of the devolatiles unit tank 1, where the devolatiles product from the upper tray 2 is collected and pumped out by a directly connected high-viscosity gear pump.

[0052] The drive shaft 32 connects to all the stirring blades 33 inside the tank 1 of the devolatile matter device, and is driven by the external drive component 31 to achieve a stirring speed of 20-50 revolutions per minute.

[0053] The volatile matter outlet 13 is located at the top of the volatile matter removal device tank 1, where volatile matter removed at each stage is collected and sent to the outside of the volatile matter removal device tank 1.

[0054] The tank body 1 of the volatile matter removal unit is the supporting structure of the entire volatile matter removal unit. The internal trays 2 are all supported on the tank body 1. A heating channel 4 is also provided on the outside of the tank body to heat the system and prevent the volatile matter from condensing on the wall surface.

[0055] The devolatilization device of this embodiment was applied to the SAN unit for devolatilization, achieving good results in the first stage of devolatilization from the mother liquor to 1000 ppm.

[0056] Example 2:

[0057] See appendix Figure 2 The first-stage tray 2 is a horizontal inner ring tray 21, equipped with stirring blades 33. The outer diameter of the horizontal tray 2 is 80% of the inner diameter of the volatile matter removal unit tank 1. The distance between the stirring blades 33 and the tray 2 is 15 mm. The stirring speed is adjustable from 2 to 15 revolutions per minute. Stirring promotes the mixing of the liquid on the tray 2 and the heat transfer between the liquid and the heating medium inside the tray 2. The film formed by stirring facilitates the entry of volatiles from the liquid phase into the gas phase. Under the action of the stirring blades 33, the material is conveyed to the periphery of the tray 2 and falls onto the next tray 2.

[0058] The second-stage tray 2 is an inclined outer ring tray 22 with stirring blades 33. The inclination angle of this tray 2 is 15°. The inner diameter of this tray 2 is 30% of the inner diameter of the volatile matter removal unit tank 1. The material on the horizontal inner ring tray 21 of the previous stage falls to the outer periphery of the inclined outer ring tray 22 and stirring blades 33 of this stage, and gathers inward under the action of stirring. During the flow process, it is also heated by the heating medium in the tray 2, thus achieving the purpose of volatile matter removal. The distance between the first-stage inner ring tray 21 and the second-stage outer ring tray 22 is 1500 mm.

[0059] The third and fourth level trays 2 can be set up with reference to the first and second level trays 2. The axial distance between the third level tray 2 and the second level tray 2 is 1600mm.

[0060] The outer diameter of the fifth-stage horizontal tray 2 is 70% of the inner diameter of the volatile matter removal unit tank 1, and the distance between it and the upper tray 2 is 2000 mm. The distance between the stirring blades 33 and the tray 2 is 20 mm. The rotation speed of the stirring blades is adjustable from 2 to 15 revolutions per minute. The stirring promotes the mixing of the liquid on the tray and the heat transfer between the liquid and the heating medium in the tray 2. The film formed by the stirring facilitates the volatile matter to enter the gas phase from the liquid phase. Under the action of the stirring blades 33, the material is conveyed to the outside of the tray 2 and falls onto the next tray 2.

[0061] The sixth stage consists of an inclined outer ring tray 22 with stirring blades 33. The tray 2 in this stage is inclined at a 60° angle. The inner diameter of tray 2 is 50% of the inner diameter of the volatile matter removal unit tank 1. The distance between tray 2 and the upper tray 2 is 2000 mm. The distance between the stirring blades 33 and tray 2 is 50 mm. The stirring speed is adjustable from 2 to 15 revolutions per minute. Stirring promotes the mixing of the liquid on tray 2 and the heat transfer between the liquid and the heating medium within tray 2. The film formed by stirring facilitates the transfer of volatiles from the liquid phase to the gas phase. Under the action of the stirring blades 33, the material is conveyed to the central area of ​​the tray and falls onto the next tray.

[0062] The volatile matter removal device of Example 2 was applied to the POE unit for volatile matter removal, achieving a good result of reducing the volatile matter from 10% at the inlet to 300 ppm.

[0063] Example 3:

[0064] See appendix Figure 3 The first-stage horizontal inner ring tray 21 is equipped with stirring blades 33. The outer diameter of the horizontal tray 21 is 90% of the inner diameter of the volatilization unit tank 1. The distance between the stirring blades 33 and the tray 2 is 15 mm. The stirring speed is adjustable from 5 to 25 revolutions per minute.

[0065] The second-stage horizontal outer ring tray 22 is equipped with stirring blades 33. The inner diameter of the outer ring tray 22 is 30% of the inner diameter of the volatile matter removal unit tank 1. The distance between the first-stage inner ring tray 21 and the second-stage outer ring tray 22 is 1500 mm.

[0066] The third stage consists of a horizontal inner ring tray 21 with stirring blades 33. The outer diameter of the horizontal tray 21 is 80% of the inner diameter of the volatile matter removal unit tank 1. The distance between it and the upper tray 2 is 1500 mm. The distance between the stirring blades 33 and the tray 2 is 20 mm. The stirring speed is adjustable from 5 to 25 revolutions per minute.

[0067] The sixth stage consists of an inclined outer ring tray 22 with stirring blades 33. The inner diameter of tray 2 is 40% of the inner diameter of the volatile matter removal tank 1. The distance between tray 2 and the upper tray is 1500mm, and the distance between stirring blades 33 and tray 2 is 20mm. The stirring speed is adjustable from 5 to 25 revolutions per minute.

[0068] The devolatilization device of Example 3 was applied to the MS device for devolatilization, achieving a result of directly removing volatiles from the reaction solution to 100 ppm.

[0069] The volatilization unit of this application has a compact structure, integrating multi-stage volatilization into a single volatilization unit tank 1, avoiding material transportation between stages and reducing construction footprint issues. Furthermore, a stirring component can be used to create a film-like structure on the tray 2, resulting in high volatilization efficiency. The presence of the stirring component also facilitates the flow of high-viscosity fluids between different stages. In addition, the tray 2 is internally heated by a heating medium, providing a large heating area, which eliminates the need for a large temperature difference to effectively achieve the removal target, significantly reducing material degradation, decomposition, and yellowing.

[0070] The drive component of this application does not require a high-power drive motor, and the equipment is simple to manufacture, with significantly lower investment and operating costs. Since the stirring operation only achieves material mixing and conveying, the shear force generated by low-speed stirring is negligible and will not cause material degradation or decomposition.

[0071] For different materials or the same material at different degrees of volatilization with varying volatile content and rheological properties, horizontal trays, inclined trays, or a combination of horizontal and inclined trays can be used. At the same time, different types of stirring components can be used. The size of the stirring blades 33, the distance from the corresponding tray 2, and the stirring speed can all be adjusted. Therefore, the dynamic tower volatilization device of the present invention has a broad range of characteristics. It can be used for volatilization of different materials and is also suitable for applications where the same material is directly volatilized from high volatile content to extremely low volatile content.

[0072] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and / or modifications falling within the scope of the invention, and all changes and / or modifications made according to embodiments of the invention should be covered within the protection scope of the invention.

Claims

1. A device for removing volatiles, characterized in that, include: The tank of the volatile matter removal unit, A multi-stage tray system is installed within the inner cavity of the volatilization unit tank. The trays consist of alternating inner and outer ring trays, with the outer diameter of the inner ring tray being larger than the inner diameter of the outer ring tray located at its lower end. A stirring assembly, comprising a drive member, a transmission shaft connected to the output shaft of the drive member, and stirring blades sleeved on the transmission shaft, the stirring blades being disposed on at least a portion of the upper surface of the tray. Both the inner and outer annular trays are constructed as hollow trays, with heating channels wound around them and connected to a heating source. Multiple circumferentially extending intercepting rings are protruding from the upper surface of the trays, and each intercepting ring has multiple circumferentially spaced notches for disconnecting it.

2. The devolatile matter removal device according to claim 1, characterized in that, The stirring blades are spaced apart from the upper surface of the corresponding tray.

3. The devolatile matter removal device according to claim 2, characterized in that, The extension plane of the stirring blade is perpendicular to the upper surface of the tray, and comb teeth are provided at the lower end of the stirring blade.

4. The devolatile matter removal apparatus according to any one of claims 1 to 3, characterized in that, The drive shaft extends axially upward through the top wall of the devolatile matter tank, and all the stirring blades are connected to the drive shaft.

5. The devolatile matter removal apparatus according to any one of claims 1 to 3, characterized in that, The outer diameter of the inner annular tray is between 70-95% of the inner diameter of the devolatile matter removal unit tank, and the inner diameter of the outer annular tray is between 20-50% of the inner diameter of the devolatile matter removal unit tank. Furthermore, the radial overlap dimension between adjacent inner annular trays and outer annular trays is at least 5% of the inner diameter of the devolatile matter removal unit tank.

6. The devolatile matter removal device according to claim 1, characterized in that, The height of each of the aforementioned interception rings is 2-3 mm.

7. The devolatile matter removal apparatus according to any one of claims 1 to 3, characterized in that, At least part of the outer ring tray is tilted, and the tilt angle of the outer ring tray does not decrease in the direction from top to bottom.

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