A distillation apparatus for plasticizers

Abstract

This invention relates to the field of distillation equipment technology, specifically disclosing a distillation apparatus for plasticizers, comprising: a distillation column, with multiple tray assemblies arranged vertically inside the column. An overflow weir is provided on one side of each tray assembly, and an adjusting component is slidably mounted on the overflow weir. A vertical pipe is provided on the upper side of the tray assembly, and a bubble cap assembly is fitted onto the vertical pipe. The bubble cap assembly includes an inner cover, which is rotatably fitted onto the surface of the vertical pipe, and an outer cover is provided on the outer side of the inner cover. In this distillation apparatus for plasticizers, when the gas flows upward at a high velocity, the gas drives the inner cover to rotate, thereby changing the direction of the gas flow. This causes the gas to enter the liquid phase at an angle and flow at an angle within the liquid phase, prolonging the mass and heat transfer time between the vapor and liquid phases. Simultaneously, the bubble cap assembly drives the adjusting component to move upward, increasing the depth of the liquid phase on the tray assembly, further improving the mass and heat transfer effect between the vapor and liquid phases.

Description

Technical Field

[0001] This invention relates to the field of distillation equipment technology, and more specifically to a distillation device for plasticizers. Background Technology

[0002] Plasticizers are widely used polymer additives in industrial production, also known as plasticizers. Any substance added to polymer materials that increases their plasticity is called a plasticizer. The use of plasticizers can improve the performance of polymer materials, reduce production costs, and increase production efficiency. They are an important class of chemical additives, widely used as auxiliaries in plastic products, concrete, mortar, cement, gypsum, cosmetics, and cleaning agents, especially in polyvinyl chloride (PVC) plastic products. The preparation of plasticizers requires distillation equipment.

[0003] Chinese patent document CN116328340B discloses a multi-stage liquid-phase material distillation device with high separation efficiency. This invention relates to the field of distillation equipment technology, including a distillation column. A liquid inlet pipe is fixedly connected to the left side of the distillation column, a collection pipe is fixedly connected to the upper side of the distillation column, a reflux pipe is fixedly connected to the upper part of the side wall of the distillation column, a discharge pipe is fixedly connected to the lower side of the distillation column, and a vapor inlet pipe is fixedly connected to the lower part of the side wall of the distillation column. The liquid inlet pipe, collection pipe, reflux pipe, discharge pipe, and vapor inlet pipe all connect the interior and exterior of the distillation column. A cleaning mechanism is provided inside the distillation column. The cleaning mechanism includes a transmission component and a rotating ring and a tray on the transmission component. The rotating ring and the tray are both located inside the distillation column and can be rotated. A bubble cap mechanism is provided on the tray.

[0004] However, the unstable vapor pressure and flow rate inside the distillation column during the distillation process can have an adverse effect on the distillation separation effect. For example, when the vapor pressure and flow rate increase, the vapor surges violently and easily carries the liquid directly to the upper tray or the top of the column, causing product contamination. In practice, this is called the mist entrainment phenomenon, which further leads to poor mass and heat transfer between the vapor and liquid phases. Summary of the Invention

[0005] This invention provides a distillation apparatus for plasticizers, aiming to solve the problem in related technologies where the violent upward surge of vapor when the vapor pressure and flow rate increase leads to poor mass and heat transfer between the vapor and liquid phases.

[0006] A distillation apparatus for plasticizers according to the present invention includes: Distillation column, used for distilling plasticizers; Multiple tray assemblies are arranged vertically inside the distillation column, with adjacent tray assemblies facing opposite directions. An overflow weir is provided on one side of each tray assembly, and a vertical pipe is provided on the upper side of each tray assembly. An adjusting element is slidably disposed on the overflow weir, and the adjusting element is used to adjust the liquid level depth on the tray assembly; The bubble cap assembly includes an inner cover that is rotatably fitted onto the surface of a vertical tube. An outer cover is provided on the outside of the inner cover. When the gas flows upward at a high speed, the gas drives the inner cover to rotate to change the direction of the gas flow, so that the gas enters the liquid phase at an angle, prolonging the mass and heat transfer time between the gas phase and the liquid phase. At the same time, the bubble cap assembly drives the regulating component to move upward, increasing the depth of the liquid phase on the tray assembly.

[0007] The beneficial effects of the present invention are as follows: when the gas flows upward at a high speed, the gas drives the inner cover to rotate and change the direction of the gas flow, so that the gas enters the liquid phase in an inclined manner, prolonging the mass and heat transfer time between the gas phase and the liquid phase, and improving the mass and heat transfer effect between the gas phase and the liquid phase.

[0008] Preferably, a connecting part is fixedly provided on the inner wall of the inner cover. The connecting part is rotatably connected to the vertical pipe. Multiple cavities are evenly arranged in the circumferential direction inside the connecting part. A first gear is provided inside each cavity. A connecting shaft is provided at the axis of the first gear. A fan blade is connected to the connecting shaft. When the first gear rotates, the first gear can drive the fan blade to rotate. The effect is that the angle of the fan blade can be adjusted by the rotation of the first gear, thereby further adjusting the flow direction of the vapor phase by the fan blade.

[0009] Preferably, the outer cover is provided with an ejector, the ejector including a support plate, and a column is rotatably provided on the upper side of the support plate. The upper end of the column passes through the top of the outer cover and extends to the outside of the outer cover, and the upper end of the column abuts against the adjusting member, and there is friction between the column and the adjusting member.

[0010] Preferably, the column is fitted with an elastic element around its periphery. One end of the elastic element is connected to the support plate, and the other end is connected to the top wall of the outer cover. Multiple racks are arranged vertically on the lower side of the support plate. Each rack corresponds to a first gear, and the lower end of the rack extends into the cavity to mesh with the first gear. The effect is that when the gas impacts the support plate at a high speed, the support plate moves upward, thereby automatically adjusting the angle of the fan blades through the racks and the first gear, which has the effect of automatically adjusting the gas flow direction.

[0011] Preferably, a plurality of connecting rods are fixedly arranged circumferentially on the lower side of the inner cover. The connecting rods are inclined on the inner cover, and the ends of the connecting rods away from the inner cover are connected to a support member.

[0012] Preferably, the support member has an overall ring structure with an L-shaped cross-section. The outer cover is rotatably installed in the groove of the support member. The surface of the outer cover is provided with through holes and liquid outlets. The effect is that a rotating sleeve is rotatably installed in the through holes, and the rotating sleeve can transport part of the liquid outside the outer cover to the inside of the outer cover, avoiding the phenomenon of overheating of the liquid between the inner cover and the outer cover.

[0013] Preferably, the outer side of the support member is provided with a toothed ring, and the rotating sleeve includes a second gear, on which a helical element is provided, and the second gear meshes with the toothed ring. The effect is that when the support member rotates, it can drive the helical element to rotate, thereby transporting part of the liquid outside the outer cover to the inside of the outer cover, achieving the purpose of automatic liquid transport.

[0014] Preferably, the adjusting component includes an overflow plate, which is slidably connected to an overflow weir. The overflow plate is provided with multiple push rods along its length, and the push rods are located directly above the column. When the gas flow velocity is high and impacts the support plate, the support plate and the column move upward, causing the overflow plate to move upward in the vertical direction. The effect is that the high gas flow velocity impacts the support plate, causing the overflow plate to move upward, thereby automatically adjusting the depth of the liquid phase and extending the mass and heat transfer time between the vapor phase and the liquid phase.

[0015] Preferably, the tray assembly includes a tray, the vertical pipes are evenly arranged on the tray, the overflow weir is located on one side of the tray, the upper end of the vertical pipe is provided with an annular groove, and the connecting part is sleeved in the annular groove.

[0016] The beneficial effects of this invention are as follows: 1. Gas enters the inner shroud from the bottom of the tray assembly. When the gas has a high velocity and impacts the top component, the fan blades tilt. When the gas acts on the tilted fan blades, it drives the inner shroud to rotate. The rotation of the inner shroud changes the flow direction of the gas, allowing the gas to enter the liquid at an angle. At the same time, the regulating component moves upward, increasing the depth of the liquid phase on the tray assembly, which prolongs the mass and heat transfer time between the vapor and liquid phases and improves the mass and heat transfer effect.

[0017] 2. When the gas velocity is low, the fan blades return to a vertical position, and the gas exerts no force on the fan blades. The inner casing is in a near-static state, allowing the gas to enter the liquid vertically. Simultaneously, the ejector exerts no force on the regulating component, causing it to move downwards. This reduces the liquid depth on the tray assembly, preventing leakage. This device automatically adjusts the mass and heat transfer time between the vapor and liquid phases based on the gas flow rate, avoiding entrainment and leakage from the tray assembly. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the distillation column of the present invention.

[0020] Figure 3 This is a schematic diagram of the connection between the tray assembly and the bubble cap assembly of the present invention.

[0021] Figure 4 This is a schematic diagram of the blister pack assembly of the present invention.

[0022] Figure 5 This is another schematic diagram of the blister pack assembly of the present invention.

[0023] Figure 6 This is a schematic diagram of the blister pack assembly structure of the present invention.

[0024] Figure 7 This is a schematic diagram of the ejector component of the present invention.

[0025] Figure 8 This is a schematic diagram of the connection part of the present invention.

[0026] Figure 9 This is a schematic diagram of the internal structure of the connecting part of the present invention.

[0027] Figure 10 This is a schematic diagram of the connection between the inner cover and the support member of the present invention.

[0028] Figure 11 This is another schematic diagram showing the connection between the inner cover and the support member of the present invention.

[0029] Figure 12 This is a schematic diagram of the tray assembly of the present invention.

[0030] Figure 13 This is a schematic diagram of the rotating sleeve of the present invention.

[0031] Figure label: 10. Distillation column; 11. Liquid inlet; 12. Steam inlet; 20. Tray assembly; 22. Tray; 23. Vertical pipe; 24. Overflow weir; 30. Bubble cap assembly; 31. Outer cover; 32. Inner cover; 33. Connecting part; 331. Fan blade; 333. First gear; 34. Top component; 341. Rack; 342. Support plate; 343. Column; 35. Elastic component; 36. Connecting rod; 37. Support component; 371. Gear ring; 38. Rotating sleeve; 381. Second gear; 382. Spiral component; 39. Liquid outlet; 40. Adjusting component; 41. Overflow plate; 42. Top rod. Detailed Implementation Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figures 1 to 13 As shown, a plasticizer distillation apparatus of the present invention includes a distillation column 10. Multiple tray assemblies 20 are vertically arranged inside the distillation column 10, with adjacent tray assemblies 20 facing opposite directions. An overflow weir 24 is provided on one side of each tray assembly 20, and an adjusting member 40 is slidably mounted on the overflow weir 24. The adjusting member 40 is used to adjust the liquid level depth on the tray assembly 20. A vertical pipe 23 is provided on the upper side of the tray assembly 20, and a bubble cap assembly 30 is fitted onto the vertical pipe 23. The bubble cap assembly 30 includes an inner cover 32, which is rotatably fitted onto the surface of the vertical pipe 23, and an outer cover 31 is provided on the outer side of the inner cover 32. When the gas flows upward at a high speed, the gas drives the inner cover 32 to rotate, thereby changing the direction of the gas flow. This causes the gas to enter the liquid phase at an angle and flow at an angle within the liquid phase, extending the mass and heat transfer time between the vapor and liquid phases. At the same time, the bubble cap assembly 30 drives the regulating assembly to move upward, increasing the depth of the liquid phase on the tray assembly 20, further improving the mass and heat transfer effect between the vapor and liquid phases.

[0033] like Figures 6 to 11 As shown, a connecting part 33 is fixedly provided on the inner wall of the inner cover 32. The connecting part 33 is rotatably connected to the vertical pipe 23. Multiple cavities are evenly arranged in the circumferential direction inside the connecting part 33. A first gear 333 is provided inside each cavity. A connecting shaft is provided at the axis of the first gear 333. The connecting shaft passes through the connecting part 33 and the inner cover 32 in sequence and is connected to the fan blade 331, so that the fan blade 331 is located on the outside of the inner cover 32. In other words, the fan blade 331 is located in the gap between the inner cover 32 and the outer cover 31. In the natural state, the fan blade 331 is arranged in a vertical state. When the first gear 333 rotates, the first gear 333 can drive the fan blade 331 to rotate at a certain angle, so that the fan blade 331 is tilted. When the vapor phase acts on the tilted fan blade 331, the inner cover 32 can be rotated to change the flow direction of the vapor phase.

[0034] like Figure 7 As shown, an ejector 34 is provided inside the outer cover 31. The ejector 34 includes a support plate 342. A column 343 is rotatably provided on the upper side of the support plate 342, so that the support plate 342 can rotate relative to the column 343. The upper end of the column 343 passes through the top of the outer cover 31 and extends to the outside of the outer cover 31. The upper end of the column 343 abuts against the adjusting member 40, so that there is friction between the column 343 and the adjusting member 40, so that the column 343 is fixed and does not rotate. A limit strip is fixedly provided on the periphery of the column 343 along the vertical direction. A limit groove is provided on the top of the outer cover 31. The limit strip corresponds to the limit groove, and the limit strip can slide in the limit groove. The limit strip and the limit groove can prevent the outer cover 31 from being fixed and not rotating.

[0035] like Figures 6 to 7As shown, an elastic element 35 is sleeved around the periphery of the column 343. One end of the elastic element 35 is connected to the support plate 342, and the other end is connected to the top wall of the outer cover 31. Multiple racks 341 are arranged vertically on the lower side of the support plate 342. Each rack 341 corresponds to a first gear 333, and the lower end of the rack 341 extends into the cavity and meshes with the first gear 333. When the gas impacts the ejector 34 at a high speed, the ejector 34 can move upward in the vertical direction, driving the adjusting member 40 to move upward. At the same time, the rack 341 moves upward, driving the first gear 333 to rotate, further causing the fan blade 331 to rotate and tilt at a certain angle. It can be understood that the greater the impact speed of the gas, the greater the upward distance of the ejector 34 and the greater the tilt angle of the fan blade 331. When the tilt angle of the fan blade 331 reaches a certain value, the gas phase enters the liquid phase in an approximately spiral downward manner for mass and heat transfer, prolonging the mass and heat transfer time and improving the mass and heat transfer effect. When the gas flow rate is low, under the action of the elastic member 35, the ejector 34 moves downward, and the rack 341 moves downward, driving the fan blade 331 to rotate in the opposite direction, reducing the tilt angle of the fan blade 331 and restoring it to its natural state. The gas phase enters the liquid phase in an approximately vertical manner for mass and heat transfer. The tilt angle here is the angle between the fan blade 331 and the vertical direction.

[0036] like Figure 6 , Figure 11 and Figure 13 As shown, multiple connecting rods 36 are fixedly arranged circumferentially on the lower side of the inner cover 32. The connecting rods 36 are inclined on the inner cover 32, and the ends of the connecting rods 36 away from the inner cover 32 are connected to a support member 37. The support member 37 has an overall annular structure and an L-shaped cross-section. The outer cover 31 is rotatably installed in the groove of the support member 37. A toothed ring 371 is provided on the outer side of the support member 37. The surface of the outer cover 31 is provided with a through hole and a liquid outlet 39. A rotating sleeve 38 is rotatably installed in the through hole. The rotating sleeve 38 includes a spiral member 382 and a second gear 381. The second gear 381 is provided with a through hole. The spiral member 382 is installed inside the through hole, and the second gear 381 meshes with the toothed ring 371. Understandably, when the gas drives the inner cover 32 to rotate, the inner cover 32 drives the support member 37 to rotate, causing the gear ring 371 to drive the second gear 381 to rotate, which in turn causes the spiral member 382 to rotate. The spiral member 382 can transport part of the liquid outside the outer cover 31 to the inside of the outer cover 31, and then flow out through the liquid outlet 39. This avoids the phenomenon of overheating of the liquid temperature between the inner cover 32 and the outer cover 31, and improves the heat transfer effect between the vapor phase and the liquid phase. At the same time, when the inner cover 32 rotates, the connecting rod 36 has a disturbing effect on the liquid, which can stir the liquid and make the liquid heat evenly. Moreover, the rotation of the connecting rod 36 can break up the clumps of gas into multiple fine vapor streams, improving the mass and heat transfer effect between the vapor phase and the liquid phase.

[0037] like Figure 3 As shown, the adjusting component 40 includes an overflow plate 41, which is slidably connected to the overflow weir 24. The overflow plate 41 is provided with multiple push rods 42 along its length. The push rods 42 are located directly above the column 343. When the gas flow velocity is high and impacts the support plate 342, the support plate 342 and the column 343 move upward, causing the overflow plate 41 to move upward in the vertical direction. This changes the overall height of the overflow plate 41 and the overflow weir 24, further adjusting the depth of the liquid on the tray assembly 20, extending the mass and heat transfer time of the vapor phase in the liquid phase, and improving the mass and heat transfer effect.

[0038] like Figure 12 As shown, the tray assembly 20 includes a tray 22, vertical pipes 23 are evenly arranged on the tray 22, an overflow weir 24 is located on one side of the tray 22, an annular groove is provided at the upper end of the vertical pipe 23, a connecting part 33 is sleeved in the annular groove, and a rack 341 is located on one side of the vertical pipe 23 so that the rack 341 and the vertical pipe 23 do not interfere with each other.

[0039] like Figure 1 As shown, a liquid inlet 11 is provided in the middle of the distillation column 10, and a steam inlet 12 is provided at the bottom of the distillation column 10. During operation, gas is introduced into the interior of the distillation column 10 through the steam inlet 12. The gas enters the interior of the inner cover 32 through the bottom of the tray assembly 20. When the gas velocity is high and impacts the top member 34, the fan blade 331 tilts. When the gas acts on the tilted fan blade 331, it drives the inner cover 32 to rotate. The rotation of the inner cover 32 changes the flow direction of the gas, allowing the gas to enter the liquid interior in an inclined direction. When the vapor velocity is low, the regulating element 40 moves upward, increasing the depth of the liquid phase on the tray assembly 20, thus prolonging the mass and heat transfer time between the vapor and liquid phases and improving the mass and heat transfer effect. When the vapor velocity is low, the fan blade 331 returns to a vertical position, and the vapor exerts no force on the fan blade 331. The inner cover 32 is in a near-static state, allowing the vapor to enter the liquid in a vertical direction. At the same time, the ejector 34 exerts no force on the regulating element 40, causing the regulating element 40 to move downward, reducing the depth of the liquid phase on the tray assembly 20 and preventing leakage from the tray assembly 20. This device can automatically adjust the mass and heat transfer time between the vapor and liquid phases according to the vapor flow rate, avoiding mist entrainment and leakage from the tray assembly 20.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A distillation apparatus for plasticizers, comprising a distillation column, characterized in that, Also includes: Multiple tray assemblies are arranged vertically inside the distillation column, with adjacent tray assemblies facing opposite directions. An overflow weir is provided on one side of each tray assembly, and a vertical pipe is provided on the upper side of each tray assembly. An adjusting element is slidably disposed on the overflow weir, and the adjusting element is used to adjust the liquid level depth on the tray assembly; A bubble cap assembly includes an inner cover that is rotatably fitted onto the surface of a vertical tube. An outer cover is provided on the outside of the inner cover. When the gas flows upward at a high speed, the gas drives the inner cover to rotate to change the direction of the gas flow, so that the gas enters the liquid phase at an angle, prolonging the mass and heat transfer time between the gas phase and the liquid phase. At the same time, the bubble cap assembly drives the regulating element to move upward, increasing the depth of the liquid phase on the tray assembly. A connecting part is fixedly provided on the inner wall of the inner cover. The connecting part is rotatably connected to the vertical tube. Multiple cavities are evenly arranged in the circumferential direction inside the connecting part. A first gear is provided inside each cavity. A connecting shaft is provided at the axis of the first gear. A fan blade is connected to the connecting shaft. When the first gear rotates, the first gear can drive the fan blade to rotate. The outer cover is provided with an ejector, which includes a support plate. A column is rotatably mounted on the upper side of the support plate. The upper end of the column passes through the top of the outer cover and extends to the outside of the outer cover. The upper end of the column abuts against an adjusting member, and there is friction between the column and the adjusting member. The column is fitted with an elastic element around its periphery. One end of the elastic element is connected to the support plate, and the other end is connected to the top wall of the outer cover. Multiple racks are arranged vertically on the lower side of the support plate. Each rack corresponds to a first gear, and the lower end of the rack extends into the cavity to mesh with the first gear. When the first gear rotates, it can drive the fan blade to rotate at a certain angle to tilt the fan blade. When the vapor phase acts on the tilted fan blade, it causes the inner cover to rotate to change the flow direction of the vapor phase. The adjusting component includes an overflow plate, which is slidably connected to an overflow weir. The overflow plate is provided with multiple push rods along its length, which are located directly above the column. When the gas flow velocity is high and impacts the support plate, the support plate and the column move upward, causing the overflow plate to move upward in the vertical direction.

2. The distillation apparatus for plasticizers according to claim 1, characterized in that, Multiple connecting rods are fixedly arranged circumferentially on the lower side of the inner cover. The connecting rods are inclined on the inner cover, and the ends of the multiple connecting rods away from the inner cover are connected to a support member.

3. The distillation apparatus for plasticizers according to claim 2, characterized in that, The support component has an overall ring structure with an L-shaped cross-section. The outer cover is rotatably installed in the groove of the support component. The surface of the outer cover is provided with through holes and liquid outlets, and a rotating sleeve is rotatably installed in the through holes.

4. The distillation apparatus for plasticizers according to claim 3, characterized in that, The outer side of the support member is provided with a toothed ring, and the rotating sleeve includes a second gear, on which a helical element is provided, and the second gear meshes with the toothed ring.

5. The distillation apparatus for plasticizers according to claim 1, characterized in that, The tray assembly includes a tray, the vertical pipes are evenly arranged on the tray, the overflow weir is located on one side of the tray, the upper end of the vertical pipe is provided with an annular groove, and the connecting part is sleeved in the annular groove.

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