Novel devolatilization device
By designing a detachable devolute distributor in the polymerization devolver, including the distribution structure of the distribution support plate, heating assembly and multiple flow holes, the problems of long material residence time, lower temperature and low plane utilization in the traditional devolver are solved, and more efficient material separation and product quality improvement are achieved.
Patent Information
- Application Number
- CN202421368128.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The devolatilization distributor of traditional polymeric devolatilizers has a large flow section, long material residence time, and a decrease in temperature that is not conducive to the devolatilization separation effect. The plane utilization rate of the distributor is low and cannot be heated, which affects product quality.
A new type of devolving distributor is designed, and its devolving distributor adopts a distributor that includes a distribution support plate, a heating assembly and a distribution structure of multiple flow holes. The distribution structure includes a distribution half-tube and a connecting half-tube, or a spherical crown distributor, making full use of the vertical space, improving plane utilization, and heating the material through the heating assembly.
The devolatilization distributor is repairable and upgradeable, which improves material separation effect and product quality, increases the production capacity of the equipment, and increases the plane utilization rate and the number of flow holes.
Smart Images
Figure CN222889395U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of devolatilizers, and particularly relates to a novel devolatilizer. Background Art
[0002] Devolatilizer is a polymer separation equipment. After the mixture that has completed the polymerization reaction enters the devolatilizer, it uses the characteristics of different boiling points of different polymer media to increase the surface area of the polymer through secondary distribution through the devolatilization distribution tube, and the different components of the polymer are gasified and separated. After devolatilization and separation, a purer product is obtained. Devolatilizer is the core equipment to remove polymer impurities and improve product quality. It is widely used in the production of polystyrene and ABS devices.
[0003] The traditional polymerization devolatilizer uses the entire pipe as a distributor, and only the lower part of the pipe serves as an effective devolatilizer distributor. The pipe has a large flow cross-section, which is not conducive to the rapid distribution of materials in the distribution pipe, and increases the residence time of the materials in the distribution pipe, resulting in a drop in temperature in the distribution pipe, which is not conducive to the devolatilization separation effect. In addition, when the distributor is installed on the tank wall or suspended under the head, the core component of the distributor (devolatilization distribution pipe) cannot be heated. When the polymer enters the devolatilization distribution pipe, the polymer temperature is lower than the inlet temperature, which is not conducive to the devolatilization separation effect. At the same time, in order to meet the requirements for personnel entry and exit during inspection and maintenance of the devolatilizer, an inspection channel needs to be reserved on the plane of the devolatilization distribution pipe constituting the distributor. The utilization rate of the devolatilizer plane is low, and the number of distribution holes is small, which is not conducive to a large number of holes to achieve the requirements of increasing production capacity and improving product quality. Utility Model Content
[0004] The utility model aims to solve the problems existing in the devolatilizer distributor of the traditional polymerization devolatilizer in the background technology and provide a new devolatilizer.
[0005] The utility model is realized by the following technical solutions:
[0006] A novel devolatilizer comprises a vertical cylinder, wherein an upper head and a lower head are respectively arranged at the top and the bottom of the cylinder, a discharge port is arranged on the lower head, a vacuum port is arranged on the outer wall of the upper head, a mounting port is arranged at the top of the upper head, and a detachable devolatilizer distributor is arranged at the mounting port at the top of the upper head. The devolatilizer distributor comprises a distribution support plate, a distribution structure arranged at the bottom of the distribution support plate for distributing materials, and a heating component arranged at the top of the distribution support plate, and a feed port connected to a connecting half pipe is arranged at the top of the distribution support plate.
[0007] Further, the distribution structure includes a plurality of distribution half-tubes arranged at the bottom end of the distribution support plate and a connecting half-tube connecting the plurality of distribution half-tubes, and a plurality of flow distribution holes are provided on the tube walls of the distribution half-tubes and the connecting half-tubes, or, the distribution structure includes a spherical cap distributor arranged at the bottom end of the distribution support plate and a plurality of flow distribution holes arranged on the spherical cap distributor, and the spherical cap distributor is hemispherical.
[0008] Furthermore, the distribution half pipe is in a straight line, a plurality of distribution half pipes are arranged in parallel and connected in sequence, the connecting half pipe is arranged in the middle of the distribution half pipe, and the length direction of the connecting half pipe is perpendicular to the length direction of the distribution half pipe.
[0009] Furthermore, the distribution half-pipe is in a circular ring shape, a plurality of distribution half-pipes are nested and connected in sequence, and the connecting half-pipe is arranged at the center of the circular ring of the distribution half-pipes.
[0010] Furthermore, the multiple distribution half-tubes are divided into several first distribution half-tubes and one second distribution half-tube, the first distribution half-tubes are straight-line, the second distribution half-tubes are circular-ring-shaped, the several first distribution half-tubes are arranged in parallel inside the circular ring of the second distribution half-tube, and are connected in sequence, the two ends of the first distribution half-tube are connected to the second distribution half-tube, the connecting half-tube is arranged in the middle of the first distribution half-tube, and the length direction of the connecting half-tube is perpendicular to the length direction of the first distribution half-tube.
[0011] Furthermore, a reinforcement ring is provided at the top end of the spherical cap distributor, and the reinforcement ring is arranged at the bottom end of the distribution support plate.
[0012] Furthermore, the flow distribution holes are arranged in a triangle, and the aperture of the flow distribution holes is φ2mm~φ6mm; and / or, the distribution half-tube and the connecting half-tube are both called arc-shaped half-tubes, the central angle subtended by the arc of the arc-shaped half-tube cross section is 124 degrees to 126 degrees, the flow distribution holes are located on the arc surface in the middle of the arc-shaped half-tube, and the central angle subtended by the arc is 111 degrees to 113 degrees, and the flow distribution holes located on the same straight line along the axis of the arc-shaped half-tube are a group, and the central angle subtended by the arc of the arc-shaped half-tube located between two adjacent groups of flow distribution holes is 1 to 2 degrees; and / or, the flow distribution holes located in the same direction section on the spherical crown distributor are a group, and the distance between two adjacent groups of flow distribution holes is 2 to 3 times the diameter of the flow distribution holes.
[0013] Furthermore, the heating assembly includes a jacket cover plate and a jacket ring arranged on the top of the distribution support plate and a first jacket tube arranged on the outside of the feed port. A first jacket cavity is formed between the distribution support plate, the jacket cover plate and the jacket ring, a second jacket cavity is formed between the first jacket tube and the feed port, the second jacket cavity is connected to the first jacket cavity, and two first heating inlets and outlets connected to the first jacket cavity are provided on the jacket cover plate.
[0014] Furthermore, an isolation plate is provided on the inner wall of the upper head above the vacuum port. The isolation plate is vertically arranged, and the bottom end of the isolation plate is lower than the bottom end of the vacuum port.
[0015] Furthermore, it also includes a lug assembly, a lower head and a lower part of the cylinder are covered with a heating outer jacket, a third jacket cavity is formed between the heating outer jacket, the lower head and the cylinder, a second jacket tube is covered on the outer side of the discharge port, a fourth jacket cavity is formed between the second jacket tube and the discharge port, the fourth jacket cavity is connected to the third jacket cavity, two second heating inlets and outlets connected to the third jacket cavity are provided on the heating outer jacket, and the height of the lower straight section of the cylinder covered by the heating outer jacket is higher than the liquid level of the deflammator in normal operation;
[0016] A heating coil is provided on the outer side of the upper head and the outer side of the vacuum port, and a third heating inlet and outlet are respectively provided at both ends of the heating coil. A heating half pipe is wound around the outer wall of the straight section of the cylinder between the upper head and the heating outer jacket, and a fourth heating inlet and outlet are provided at both ends of the heating half pipe.
[0017] The ear assembly includes an upper ring plate, a lower ring plate and a plurality of connecting rib plates. The upper ring plate and the lower ring plate are sleeved on the outer wall of the cylinder. The plurality of connecting rib plates are arranged at intervals along the circumference of the cylinder, and the top and bottom ends of the connecting rib plates are respectively welded to the upper ring plate and the lower ring plate. There is a space between the connecting rib plate and the cylinder, and the upper ring plate and the lower ring plate are provided with a notch for the heating half pipe to pass through.
[0018] Compared with the prior art, the beneficial effects of the utility model are:
[0019] (1) The devolatilizer distributor is detachably connected to the upper head, so that the devolatilizer distributor can be maintained and upgraded, and the devolatilizer distributor can be upgraded and maintained according to different product quality and different production capacity requirements; and there is no need to reserve a maintenance channel for personnel to enter and exit the equipment, and the plane utilization rate is further improved. The large increase in surface area is conducive to increasing the number of flow distribution holes of the devolatilizer distributor. As the number of flow distribution holes increases, the surface area of the fluid increases, and the materials inside the fluid are fully separated, which is conducive to improving product quality and promoting higher production capacity of the equipment;
[0020] (2) The devolatilizer distributor is set at the top of the upper head, which makes full use of the vertical space of the devolatilizer and increases the time for the material to flow from the devolatilizer distributor to the normal operating liquid surface. The longer the flow time, the more complete the separation effect of different materials in the fluid, which is conducive to improving product quality.
[0021] (3) The devolatilizer distributor is provided with a heating component, which can heat the materials in the devolatilizer distributor and the feed port, so that the materials are still in a heated state after entering the devolatilizer distributor, avoiding the disadvantage that the materials in the traditional devolatilizer distributor cannot be heated, which affects the product quality. At the same time, the temperature in the devolatilizer distributor can be accurately controlled by adjusting the temperature of the heating component, and the devolatilization effect of different products at different temperatures can be controlled to improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural schematic diagram of the first embodiment of the novel devolatilizer of the utility model;
[0023] Figure 2 It is a schematic diagram of a first embodiment of the arrangement of the distribution half-tube and the connection half-tube in the novel devolatilizer of the utility model;
[0024] Figure 3 It is a schematic diagram of a second embodiment of the arrangement of the distribution half-tube and the connection half-tube in the novel devolatilizer of the utility model;
[0025] Figure 4 It is a schematic diagram of a third embodiment of the arrangement of the distribution half-tube and the connection half-tube in the novel devolatilizer of the utility model;
[0026] Figure 5 It is a schematic diagram of the arrangement of the flow distribution holes in the novel devolatilizer of the utility model;
[0027] Figure 6 It is a structural schematic diagram of the second embodiment of the new devolatilizer of the utility model.
[0028] In the figure, 10-cylinder, 20-upper head, 30-lower head, 40-discharge port, 50-vacuum port, 60-devolatilization distributor, 61-distribution support plate, 62-distribution structure, 621-distribution half pipe, 622-connecting half pipe, 623-flow hole, 624-spherical crown distributor, 625-reinforcement ring, 63-feed port, 64-jacket cover plate, 65-jacket ring, 66-first jacket pipe, 67-first heating inlet and outlet, 70-isolation plate, 80-heating outer jacket, 90-second jacket pipe, 100-second heating inlet and outlet, 110-heating coil, 120-third heating inlet and outlet, 130-heating half pipe, 140-fourth heating inlet and outlet, 150-support ear assembly, 151-upper ring plate, 152-lower ring plate, 153-connecting rib plate. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present utility model, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0033] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.
[0034] See also Figures 1 to 5 , Figure 1 This is a schematic structural diagram of the first embodiment of the new devolatilizer of the utility model. Figure 2 This is a schematic diagram of a first embodiment of the arrangement of the distribution half-tube and the connection half-tube in the novel devolatilizer of the utility model. Figure 3 This is a schematic diagram of a second embodiment of the arrangement of the distribution half-tube and the connecting half-tube in the novel devolatilizer of the utility model. Figure 4 This is a schematic diagram of a third embodiment of the arrangement of the distribution half-tube and the connection half-tube in the novel devolatilizer of the utility model. Figure 5The schematic diagram of the flow distribution hole arrangement in the novel devolatilizer of the utility model. A novel devolatilizer comprises a vertical cylinder 10, wherein the top and bottom ends of the cylinder 10 are respectively provided with an upper head 20 and a lower head 30, the lower head 30 is provided with a discharge port 40, the outer wall of the upper head 20 is provided with a vacuum port 50, the top end of the upper head 20 is provided with a mounting port, and a detachable devolatilizer distributor 60 is provided at the mounting port at the top end of the upper head 20, the devolatilizer distributor 60 comprises a distribution support plate 61, a distribution structure 62 arranged at the bottom of the distribution support plate 61 for distributing materials, and a heating assembly arranged at the top end of the distribution support plate 61, and the top end of the distribution support plate 61 is provided with a feed port 63 connected to a connecting half pipe 622.
[0035] Specifically, the devolatilizer distributor 60, the upper head 20, the cylinder 10 and the lower head 30 constitute a closed devolatilizer space inside the devolatilizer. Under the negative pressure of the vacuum port 50, the devolatilizer space inside the devolatilizer is in a negative pressure state. The material enters the devolatilizer distributor 60 from the feed port 63, and the distribution structure 62 of the devolatilizer distributor 60 is provided with a plurality of distribution holes 623. The material flows out from the plurality of distribution holes 623 of the distribution structure 62, so that the material flows from the top of the devolatilizer to the bottom of the devolatilizer in a strip shape. In order to prevent the material from forming a short circuit and being directly drawn out of the devolatilizer by the vacuum port 50, in one embodiment, an isolation plate 70 is provided on the inner wall of the upper head 20 above the vacuum port 50. The isolation plate 70 is vertically arranged, and the bottom end of the isolation plate 70 is lower than the bottom end of the vacuum port 50. The isolation plate 70 is vertically arranged on one side of the vacuum port 50 to isolate the strip material from the vacuum port 50, thereby preventing the strip material from forming a short circuit, thereby preventing the material from being directly drawn out of the devolatilizer by the vacuum port 50. During the flow of the strip material, the different boiling points of different polymer media are utilized to separate different media, wherein the light component is separated and drawn out of the devolatilizer through the vacuum port 50, and the heavy component is deposited at the bottom of the devolatilizer and enters the next production link of the device through the material port.
[0036] The distribution support plate 61 of the devolatilizer distributor 60 can be arranged at the top of the upper head 20 through flanges and bolts to realize the detachable connection between the devolatilizer distributor 60 and the upper head 20, so as to realize that the devolatilizer distributor 60 is maintainable and upgradeable, and the devolatilizer is upgraded and maintained according to different product quality and different production capacity requirements. The design scheme of placing the detachable devolatilizer distributor 60 at the top of the upper head 20 makes full use of the vertical space of the devolatilizer, increases the time for the material to flow from the devolatilizer distributor 60 to the normal operating liquid surface, and the longer the flow time, the more sufficient the separation effect of different materials in the fluid is, which is conducive to improving the product quality. The devolatilizer distributor 60 adopts a detachable structure, and there is no need to reserve a maintenance channel for personnel to enter and exit the equipment, which further improves the plane utilization rate of the devolatilizer distributor, and is conducive to increasing the number of openings of the distribution hole 623 of the devolatilizer distributor 60. With the increase in the number of openings of the distribution hole 623, the surface area of the fluid increases, and the material inside the fluid is fully separated, which is conducive to improving the product quality. The increase in the number of openings also promotes higher production capacity of the equipment.
[0037] In order to further improve the plane utilization rate of the distribution structure 62 of the devolatilizer distributor, in one embodiment, the distribution structure 62 includes a plurality of distribution half-tubes 621 arranged at the bottom end of the distribution support plate 61 and a connecting half-tube 622 connecting the plurality of distribution half-tubes 621, and a plurality of distribution holes 623 are arranged on the tube walls of the distribution half-tubes 621 and the connecting half-tubes 622. The material enters the devolatilizer distributor 60 from the feed inlet 63, and then flows from the top of the devolatilizer to the bottom of the devolatilizer in a strip shape after passing through the distribution half-tubes 621 and the connecting half-tubes 622 of the devolatilizer distributor 60. The devolatilizer distributor 60 adopts a scheme in which a plurality of distribution half-tubes 621 are arranged on the distribution support plate 61, which reduces the flow cross-sectional area of the devolatilizer distributor 60, increases the flow velocity of the material inside the devolatilizer distributor 60, shortens the residence time of the material in the devolatilizer, is conducive to rapid devolatilization separation, improves the devolatilization separation effect, and increases the production capacity; and the scheme of adopting a plurality of distribution half-tubes 621 can increase the surface area of the devolatilizer distributor 60, and increases the number of distribution holes 623 opened on the devolatilizer distributor 60;
[0038] In one embodiment, the distribution half-tube 621 is in a straight line, a plurality of distribution half-tubes 621 are arranged in parallel and connected in sequence, a connecting half-tube 622 is arranged in the middle of the distribution half-tube 621, and the length direction of the connecting half-tube 622 is perpendicular to the length direction of the distribution half-tube 621. The plurality of distribution half-tubes 621 are arranged in parallel so that the plurality of distribution half-tubes 621 occupy the bottom plane space of the distribution support plate 61 as much as possible, and then the plurality of distribution half-tubes 621 are connected through the connecting half-tube 622. The material enters the connecting half-tube 622 from the feed port 63, and flows to the plurality of distribution half-tubes 621 through the connecting half-tube 622, so as to realize the distribution of the material inside the devolatilizer.
[0039] In one embodiment, the distribution half-tube 621 is in a circular ring shape, and a plurality of distribution half-tubes 621 are nested and connected in sequence, and the connecting half-tube 622 is arranged at the center of the circle of the distribution half-tube 621. The plurality of distribution half-tubes 621 are cocentrically nested at the bottom of the distribution support plate 61, so that the plurality of distribution half-tubes 621 occupy as much of the plane space at the bottom of the distribution support plate 61 as possible, and then the plurality of distribution half-tubes 621 are connected through the connecting half-tube 622. The material enters the connecting half-tube 622 from the feed port 63, and flows to the plurality of distribution half-tubes 621 through the connecting half-tube 622, so as to realize the distribution of the material inside the devolatilizer.
[0040] In one embodiment, the plurality of distribution half-tubes 621 are divided into a plurality of first distribution half-tubes 621 and a second distribution half-tube 621, the first distribution half-tubes 621 are in a straight line shape, the second distribution half-tubes 621 are in a circular ring shape, the plurality of first distribution half-tubes 621 are arranged in parallel inside the circular ring of the second distribution half-tube 621, and are connected in sequence, the two ends of the first distribution half-tube 621 are connected to the second distribution half-tube 621, the connecting half-tube 622 is arranged in the middle of the first distribution half-tube 621, and the length direction of the connecting half-tube 622 is perpendicular to the length direction of the first distribution half-tube 621. A plurality of first distribution half-tubes 621 are arranged in parallel, and a circular second distribution half-tube 621 is arranged outside the plurality of first distribution half-tubes 621, so that the plurality of first distribution half-tubes 621 and the second distribution half-tube 621 occupy as much of the bottom plane space of the distribution support plate 61 as possible, and then the plurality of first distribution half-tubes 621 and the second distribution half-tube 621 are connected through the connecting half-tube 622. The material enters the connecting half-tube 622 from the feed port 63, and flows to the multiple distribution half-tubes 621 through the connecting half-tube 622, so as to realize the distribution of the material inside the devolatilizer.
[0041] By adopting the above-mentioned three arrangements of distribution half-tubes 621 and connecting half-tubes 622, the distribution half-tubes 621 can cover the bottom end of the distribution support plate 61 as much as possible, thereby improving the plane utilization rate of the devolatilizer distributor 60, which is beneficial to increasing the number of openings of the flow distribution holes 623 of the devolatilizer distributor 60, and a plurality of distribution half-tubes 621 are used to form a wave structure, which increases the surface area of the devolatilizer distributor 60, and is also beneficial to increasing the number of openings of the flow distribution holes 623 of the devolatilizer distributor 60. As the number of openings of the flow distribution holes 623 increases, the surface area of the fluid increases, and the material inside the fluid is fully separated, which is beneficial to improving product quality. The increase in the number of openings also promotes higher production capacity of the equipment.
[0042] Please refer to Figure 6 , Figure 6The schematic diagram of the structure of the second embodiment of the new devolatilizer of the utility model. In order to further improve the plane utilization rate of the distribution structure 62 of the devolatilizer distributor, in one embodiment, the distribution structure 62 includes a spherical cap distributor 624 arranged at the bottom of the distribution support plate 61 and a plurality of distribution holes 623 arranged on the spherical cap distributor 624, and the spherical cap distributor 624 is hemispherical. The distribution structure 62 adopts a spherical cap distributor 624, and the inner and outer surfaces of the spherical cap distributor 624 are spherical, which can cover the entire bottom of the distribution support plate 61, and the entire spherical cross section of the spherical cap distributor 624 can be used as the opening cross section of the distribution hole. The more the number of distribution hole openings, the larger the surface area of the devolatilizer, the more conducive to the devolatilization separation effect, and the more conducive to improving the product quality. In order to avoid the deformation and leakage of the sealing surface of the spherical cap distributor 624 due to the temperature load, in one embodiment, a reinforcing ring 625 is provided at the top of the spherical cap distributor 624, and the reinforcing ring 625 is arranged at the bottom of the distribution support plate 61. When the material enters the spherical cap distributor 624, the spherical cap distributor 624 is restricted by the reinforcing ring 625, and the deformation caused by the temperature rise expands toward the convex surface of the spherical cap distributor 624. The force direction is clear and the spherical surface is evenly stressed, thereby avoiding excessive deformation of the spherical cap distributor 624 due to temperature difference stress or local deformation due to excessive local force, thereby meeting the requirements for long-term operation of the devolatilization distributor 60.
[0043] In one embodiment, the flow distribution holes 623 are arranged in a triangle shape, and the aperture of the flow distribution holes 623 is φ2mm~φ6mm; this arrangement ensures the flow distribution effect of the flow distribution holes 623 while increasing the number of openings of the flow distribution holes 623 per unit area of the distribution structure 62.
[0044] Regarding the arrangement scheme of the distribution structure 62 being a distribution half pipe 621 and a connecting half pipe 622, in one embodiment, the distribution half pipe 621 and the connecting half pipe 622 are both called arc-shaped half pipes, the central angle of the arc of the arc-shaped half pipe cross section is 124 to 126 degrees, the flow distribution holes 623 are located on the arc surface in the middle of the arc-shaped half pipe, and the central angle of the arc is 111 to 113 degrees, along the axis of the arc-shaped half pipe, the flow distribution holes 623 located on the same straight line are a group, and the central angle of the arc of the arc-shaped half pipe located between two adjacent groups of flow distribution holes 623 is 1 to 2 degrees. For two adjacent groups of flow distribution holes 623, one group is the flow distribution holes 623 on the AA axis, and the other group is the flow distribution holes 623 on the BB axis, as shown in FIG. Figure 5As shown, the distribution holes 623 of the AA axis and the distribution holes 623 of the BB axis are staggered by 1 to 2 degrees on the circumference, that is, on the same cross section of the arc-shaped half-tube, the central angle of the arc of the arc-shaped half-tube located between two adjacent distribution holes 623 is 2 to 4 degrees. This arrangement allows the spacing between the AA axis and the BB axis in the axial direction of the distribution half-tube 621 to be controlled to be 2 to 3 times the diameter of the distribution hole 623, and through the alternate hole opening scheme of the AA axis and the BB axis, the distribution holes 623 at the lower part of the arc-shaped half-tube are arranged in a triangular shape.
[0045] For the scheme where the distribution structure 62 is a spherical cap distributor 624, in one embodiment, the distribution holes 623 on the spherical cap distributor 624 located in the same direction section are grouped together, and the distance between two adjacent groups of distribution holes 623 is 2 to 3 times the diameter of the distribution holes 623. The entire hemispherical cross section of the spherical cap distributor 624 can be used as the opening section of the distribution holes. For the two adjacent groups of distribution holes 623, one group is the distribution holes 623 on the AA axis, and the other group is the distribution holes 623 on the BB axis. Figure 5 As shown, through the alternating hole opening scheme of the AA axis and the BB axis, the lower flow distribution holes 623 of the spherical cap distributor 624 are arranged in a triangular shape, thereby increasing the number of openings of the flow distribution holes 623 per unit area of the spherical cap distributor 624 .
[0046] In one embodiment, the number of feed ports 63 is one or two. When there is one feed port 63, the feed port 63 is arranged at the center position of the distribution support plate 61, and the feed port 63 is connected to the connecting half pipe 622 or the spherical cap distributor 624. When there are two feed ports 63, the two feed ports 63 are symmetrically arranged with the center position of the distribution support plate 61 as the symmetry point, and the two feed ports 63 are connected to the connecting half pipe 622 or the spherical cap distributor 624.
[0047] The heating component is used to heat the materials in the devolatilization distributor 60 and the feed port 63, so that the materials are still in a heated state after entering the devolatilization distributor 60, avoiding the disadvantage that the materials in the traditional devolatilization distributor 60 cannot be heated, which affects the product quality. At the same time, by adjusting the temperature of the heating component, the temperature in the devolatilization distributor 60 can be accurately controlled, and the devolatilization effect of different products at different temperatures can be controlled to improve the product quality. In one embodiment, the heating component includes a jacket cover plate 64 and a jacket ring 65 arranged at the top of the distribution support plate 61, and a first jacket tube 66 sleeved on the outside of the feed port 63. The distribution support plate 61, the jacket cover plate 64 and the jacket ring 65 form a first jacket cavity, the first jacket tube 66 and the feed port 63 form a second jacket cavity, the second jacket cavity is connected to the first jacket cavity, and the jacket cover plate 64 is provided with two first heating inlets and outlets 67 connected to the first jacket cavity. The heating fluid flows into the first jacket cavity and the second jacket cavity from one heating inlet and outlet, and then flows out from another heating inlet and outlet, so that the heating fluid circulates in the first jacket cavity and the second jacket cavity, thereby heating the materials in the devolatilization distributor 60 and the feed inlet 63. The temperature of the heating component is adjusted by adjusting the temperature of the heating fluid.
[0048] Different heating devices are arranged on the outside of the devolatilizer according to different forms of materials and different reaction times. In one embodiment, the novel devolatilizer of the utility model further comprises a support ear assembly 150, a heating outer jacket 80 is sleeved on the lower end cap 30 and the lower part of the cylinder 10, a third jacket cavity is formed between the heating outer jacket 80, the lower end cap 30 and the cylinder 10, a second jacket tube 90 is sleeved on the outer side of the discharge port 40, a fourth jacket cavity is formed between the second jacket tube 90 and the discharge port 40, the fourth jacket cavity is connected with the third jacket cavity, two second heating inlets and outlets 100 connected with the third jacket cavity are arranged on the heating outer jacket 80, and the height of the lower straight section of the cylinder 10 covered by the heating outer jacket 80 is higher than the liquid level of the normal operation of the devolatilizer; a heating outer jacket 80 is provided on the outer side of the upper end cap 20 and the outer side of the vacuum port 50 A heating coil 110, wherein the third heating inlet and outlet 120 are respectively arranged at both ends of the heating coil 110, a heating half-tube 130 is wound around the outer wall of the straight section of the cylinder 10 between the upper head 20 and the heating outer jacket 80, and a fourth heating inlet and outlet 140 are arranged at both ends of the heating half-tube 130, and the ear assembly 150 comprises an upper ring plate 151, a lower ring plate 152 and a plurality of connecting ribs 153, the upper ring plate 151 and the lower ring plate 152 are sleeved on the outer wall of the cylinder 10, and the plurality of connecting ribs 153 are arranged at intervals along the circumference of the cylinder 10, and the top and bottom ends of the connecting ribs 153 are respectively welded to the upper ring plate 151 and the lower ring plate 152, and there is a space between the connecting ribs 153 and the cylinder 10, and the upper ring plate 151 and the lower ring plate 152 are provided with a notch for the heating half-tube 130 to pass through.
[0049] The lower end cap 30 and the lower part of the cylinder 10 are heated by a jacket, the remaining straight section of the cylinder 10 is heated by a heating half pipe 130, and the outer side of the upper end cap 20 and the outer side of the vacuum tube are heated by a heating coil 110, so as to achieve full coverage of the external heating of the devolatilizer, ensuring that the material is heated from the inside of the devolatilizer to the discharge port 40. The devolatilization process inside the devolatilizer is a process in which different polymer media have different boiling points and are flash-separated inside the devolatilizer. When the material flashes, it needs to absorb heat, resulting in a decrease in the temperature inside the devolatilizer. When the devolatilizer distributor is located at the top of the devolatilizer, as the material is separated from top to bottom, the temperature of the strip material decreases from high to low. Less heat needs to be added at high temperatures, so the upper head 20 and the vacuum port 50 are heated by the heating coil 110 in line contact with the outer surface of the upper head 20 and the vacuum port 50; the middle part with lower temperature is heated by the heating half pipe 130 in surface contact with the cylinder 10, which has a better heating effect; the liquid phase space with the lowest temperature after devolatilization is heated by the heating outer jacket 80 with the largest heating area. Different heating methods are used for the outside of the devolatilizer according to the different forms of the material, so that the full coverage of the devolatilizer heating is achieved, and the temperature inside the devolatilizer is also accurately controlled, which is conducive to the control of the devolatilization effect at different temperatures for different products, and improves product quality. There is also space between the connecting rib plate 153 and the cylinder 10, reserving space for laying pipes for the heating half-tube 130. At the same time, there are gaps on the upper ring plate 151 and the lower ring plate 152 for the heating half-tube 130 to pass through, so that the heating half-tube 130 can be arranged around the outer wall of the cylinder 10 without leaving any gaps, thereby avoiding temperature discontinuity on the cylinder 10, thereby avoiding the existence of a temperature dead zone at the position of the ear assembly 150 on the cylinder 10, and improving product quality.
[0050] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A novel devolatilizer, characterized in that: It comprises a vertical cylinder, wherein an upper head and a lower head are respectively provided at the top and the bottom of the cylinder, the lower head is provided with a discharge port, the outer wall of the upper head is provided with a vacuum port, the top of the upper head is provided with a mounting port, and a detachable devolatilization distributor is provided at the mounting port at the top of the upper head, the devolatilization distributor comprises a distribution support plate, a distribution structure arranged at the bottom of the distribution support plate for distributing materials, and a heating component arranged at the top of the distribution support plate, the top of the distribution support plate is provided with a feed port connected to a connecting half-tube, the distribution structure comprises a plurality of distribution half-tubes arranged at the bottom of the distribution support plate and a connecting half-tube connecting the plurality of distribution half-tubes, a plurality of flow distribution holes are provided on the tube walls of the distribution half-tube and the connecting half-tube, or the distribution structure comprises a spherical cap distributor arranged at the bottom of the distribution support plate and a plurality of flow distribution holes arranged on the spherical cap distributor, and the spherical cap distributor is hemispherical.
2. The novel devolatilizer according to claim 1, characterized in that: The distribution half pipe is in a straight line, a plurality of the distribution half pipes are arranged in parallel and connected in sequence, the connecting half pipe is arranged in the middle of the distribution half pipe, and the length direction of the connecting half pipe is perpendicular to the length direction of the distribution half pipe.
3. The novel devolatilizer according to claim 1, characterized in that: The distribution half pipe is in a circular ring shape, a plurality of the distribution half pipes are nested and connected in sequence, and the connecting half pipe is arranged at the center of the distribution half pipe ring.
4. The novel devolatilizer according to claim 1, characterized in that: The multiple distribution half-tubes are divided into a plurality of first distribution half-tubes and a second distribution half-tube, the first distribution half-tubes are in a straight line shape, the second distribution half-tubes are in a circular ring shape, the plurality of first distribution half-tubes are arranged in parallel inside the circular ring of the second distribution half-tube and are connected in sequence, the two ends of the first distribution half-tube are connected to the second distribution half-tube, the connecting half-tube is arranged in the middle of the first distribution half-tube, and the length direction of the connecting half-tube is perpendicular to the length direction of the first distribution half-tube.
5. The novel devolatilizer according to claim 1, characterized in that: A reinforcement ring is provided at the top end of the spherical cap distributor, and the reinforcement ring is arranged at the bottom end of the distribution support plate.
6. The novel devolatilizer according to claim 1, characterized in that: The flow distribution holes are arranged in a triangle shape, and the aperture of the flow distribution holes is φ2mm~φ6mm; and / or, the distribution half-tube and the connecting half-tube are both called arc-shaped half-tubes, the central angle of the arc of the arc-shaped half-tube cross section is 124 degrees to 126 degrees, the flow distribution holes are located on the arc surface in the middle of the arc-shaped half-tube, and the central angle of the arc is 111 degrees to 113 degrees, along the axis of the arc-shaped half-tube, the flow distribution holes located on the same straight line are a group, and the central angle of the arc of the arc-shaped half-tube located between two adjacent groups of flow distribution holes is 1 to 2 degrees; and / or, the flow distribution holes located in the same direction section on the spherical crown distributor are a group, and the distance between two adjacent groups of flow distribution holes is 2 to 3 times the diameter of the flow distribution holes.
7. The novel devolatilizer according to claim 1, characterized in that: The heating assembly includes a jacket cover plate and a jacket ring arranged on the top of a distribution support plate, and a first jacket tube arranged on the outside of a feed port, a first jacket cavity is formed between the distribution support plate, the jacket cover plate and the jacket ring, a second jacket cavity is formed between the first jacket tube and the feed port, the second jacket cavity is connected to the first jacket cavity, and two first heating inlets and outlets connected to the first jacket cavity are provided on the jacket cover plate.
8. The novel devolatilizer according to claim 1, characterized in that: An isolation plate is provided on the inner wall of the upper head at a position above the vacuum port. The isolation plate is vertically arranged, and the bottom end of the isolation plate is lower than the bottom end of the vacuum port.
9. The novel devolatilizer according to claim 1, characterized in that: It also includes a lug assembly, the lower head and the lower part of the cylinder are covered with a heating outer jacket, the heating outer jacket, the lower head and the cylinder form a third jacket cavity, the outer side of the discharge port is covered with a second jacket pipe, the second jacket pipe and the discharge port form a fourth jacket cavity, the fourth jacket cavity is connected to the third jacket cavity, the heating outer jacket is provided with two second heating inlets and outlets connected to the third jacket cavity, and the height of the lower straight section of the cylinder covered by the heating outer jacket is higher than the liquid level of the deflammator in normal operation; A heating coil is provided on the outside of the upper head and the outside of the vacuum port, and a third heating inlet and outlet are respectively provided at both ends of the heating coil. A heating half pipe is wound around the outer wall of the straight section of the cylinder between the upper head and the heating outer jacket, and a fourth heating inlet and outlet are provided at both ends of the heating half pipe. The ear assembly includes an upper ring plate, a lower ring plate and a plurality of connecting rib plates, wherein the upper ring plate and the lower ring plate are sleeved on the outer wall of the cylinder, and the plurality of connecting rib plates are arranged at intervals along the circumference of the cylinder, and the top and bottom ends of the connecting rib plates are respectively connected to the upper ring plate and the lower ring plate, and there is a space between the connecting rib plate and the cylinder, and the upper ring plate and the lower ring plate are provided with a notch for the heating half pipe to pass through.