Decompression rectification device for damping oil

Abstract

The invention discloses a vacuum rectification device for damping oil, and relates to the technical field of rectification devices, the vacuum rectification device comprises a rectification tower, two reaction kettles, a riser and a shunting device; the flow dividing device comprises a flow collecting plate, a flow guide ring and two flow dividing grooves, a recycling groove is formed in the flow guide ring, two flow guide holes are formed in the bottom in the recycling groove, and the two flow dividing grooves communicate with the two flow guide holes correspondingly; each collector plate comprises a main body, an upper folded plate and a lower folded plate, and a V-shaped groove with an upward opening is formed between the bottom of the lower folded plate and the bottom of the main body; a groove with a downward opening is formed between the bottom of the upper folding plate and the bottom of the main body; the length of the cross section of the upper folded plate is smaller than that of the cross section of the lower folded plate; the technical effects that air flow can be stabilized, the influence of the air flow on backflow liquid is reduced, and meanwhile the backflow liquid is more concentrated are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of distillation devices, and in particular to a vacuum distillation device for damping oil. Background Art

[0002] Damping oil usually refers to lubricating oil used in various dampers, such as automobile shock absorbers, hydraulic buffers, vibration control devices in construction projects, etc. Its main function is to provide damping force, reduce vibration and impact, so as to achieve the purpose of shock absorption, noise reduction and smooth movement. The refining of damping oil refers to the extraction of lubricating oil that meets specific performance requirements from crude oil through a series of physical and chemical processes.

[0003] At present, there are many process designs in China that discharge materials from reactors directly into distillation systems. If the production capacity of such systems is to be increased during operation, it is necessary to re-configure a set of reactors and distillation systems, or to install a new reactor and merge it into the distillation tower currently in use. The former is more expensive and has limitations in civil engineering design, lacks sufficient space and load-bearing capacity, and has high equipment costs. The latter is caused by uneven distribution of reflux in the distillation tower, resulting in the reactor operating effect not meeting the demand, causing the reactor load to be unable to reach the design capacity, resulting in a decrease in the output of a single reactor, which seriously restricts the stable operation of the device at full load. A Chinese patent with authorization announcement number CN113350821B in the prior art discloses a device for improving the operating effect of a distillation system, including a distillation tower, two reactors, a riser, and a splitter. The riser is an inverted Y-shaped structure. The bottom of the distillation tower is connected to the top of the riser. The riser consists of an upper main pipe and two lower branch pipes. Two outlets of the two branch pipes are respectively connected to the two reactors. The splitter is located inside the distillation tower near the bottom. The bottom of the splitter is connected to two reflux pipes, respectively. The two reflux pipes extend into the two branch pipes of the riser, respectively. The diversion device includes a collecting plate, a recovery trough, and two diversion troughs. The recovery trough and the diversion trough are respectively located below the collecting plate. The diversion trough is located below the recovery trough. The recovery trough is respectively connected to the two diversion troughs. The two diversion troughs are respectively connected to the diversion pipes. The collecting plate is formed by double V-shaped collecting plates connected to each other. The two V-shaped collecting plates are connected at one end. The opening directions of the two V-shaped plates are opposite. The two V-shaped plates are arranged up and down, and adjacent double V-shaped collecting plates are partially overlapped in the horizontal direction.

[0004] The above-mentioned distillation device adds a reactor on the basis of the original set of reactors and distillation towers, which can improve the distillation efficiency when two reactors are operated at the same time. However, in the process of collecting the reflux liquid, the collector plate in the above-mentioned device has the airflow flowing upward from the bottom of the collector plate. When the airflow passes through the upper V-shaped plate, it is easy to be blocked by the V-shaped plate and direct the airflow to the lower V-shaped plate, thereby affecting the reflux liquid collected on the lower V-shaped plate, causing the reflux liquid to have the risk of overflow or splashing, and at the same time making the airflow between multiple collector plates turbulent. The mass of the concentrated reflux liquid is large, which is easy to attract the mist particles in the airflow. When the airflow blows to the reflux liquid collected on the lower V-shaped plate, the mist particles in the airflow that were originally going to enter the distillation tower are mixed with the reflux liquid, and the number of particles entering the refining tower is reduced. Secondly, impurities may be mixed in the reflux liquid, thereby affecting the refining efficiency and refining quality. Summary of the invention

[0005] The embodiment of the present application provides a vacuum distillation device for damping oil, which solves the technical problem in the prior art that the airflow is easily disturbed when passing through the collecting plate, blows towards the collected reflux liquid, and affects the refining efficiency. It achieves the technical effect of stabilizing the airflow, reducing the impact of the airflow on the reflux liquid, and making the reflux liquid more concentrated.

[0006] The embodiment of the present application provides a vacuum distillation device for damping oil, comprising a distillation tower, two reaction kettles, a gas riser, and a flow diverter; the flow diverter comprises a collecting plate, a guide ring, and two flow diverter grooves, a recovery groove is provided in the guide ring, and two flow diversion holes are provided at the bottom of the recovery groove, and the two flow diversion grooves are respectively connected to the two flow diversion holes; There are multiple collecting plates, which are fixed in the middle of the guide ring. The collecting plates include a main body, an upper folding plate and a lower folding plate. The upper folding plate and the lower folding plate are respectively arranged on the left and right sides of the main body. The upper folding plate is fixed to the upper end of the main body, and the lower folding plate is fixed to the lower end of the main body. A V-shaped groove with an opening upward is formed between the bottom of the lower folding plate and the bottom of the main body; a groove with an opening downward is formed between the bottom of the upper folding plate and the bottom of the main body; the cross-sectional length of the upper folding plate is smaller than the cross-sectional length of the lower folding plate.

[0007] Preferably, the guide ring is annular as a whole, the lower end face of the guide ring is a horizontally arranged circular ring plate, the annular center of the lower end face of the guide ring is a vent, and the inner ring edge and the outer ring edge of the guide ring are both provided with vertical side walls, wherein the height of the side wall of the outer ring is greater than the height of the side wall of the inner ring, the two ends of the bottom of the collecting plate are fixed to the top edge of the inner wall of the guide ring, and the height of the outer wall of the guide ring is greater than or equal to the sum of the height of the inner wall and the height of the collecting plate; the recovery groove is located between the inner wall and the outer wall of the guide ring; an intermediate plate is horizontally arranged in the middle of the top of the inner wall of the guide ring, the intermediate plate is a straight plate with a V-shaped cross section, the length direction of the intermediate plate passes through the center of the vent, and the two ends of the length direction of the bottom of the intermediate plate are fixed to the top of the inner wall of the guide ring; the cross-sectional length of the lower folding plate is 1.5 to 5 times the cross-sectional length of the upper folding plate.

[0008] Preferably, the plurality of collecting plates are linearly arranged along the radial direction of the vent and symmetrically arranged on both sides of the length direction of the middle plate, wherein the lengths of the plurality of collecting plates are matched with the inner wall edge of the guide ring, so as to guide the reflux liquid into the recovery groove; between adjacent collecting plates, the end of the upper folding plate away from the main body is located directly above the lower folding plate, so as to allow the reflux liquid falling onto the upper folding plate to slide into the V-shaped groove formed between the lower folding plate and the main body, so that the reflux liquid gathers in the V-shaped groove and is then guided into the recovery groove by the V-shaped groove; the highest points of the two lower folding plates on the adjacent sides of the middle plate are located directly above the middle plate; the cross-sectional length of the upper folding plate farthest from the middle plate on both sides in the length direction is matched with the inner wall of the guide ring, and its edge is located directly above the inner ring edge of the recovery groove, so as to guide the reflux liquid to fall into the recovery groove.

[0009] Preferably, the heights of the plurality of current collecting plates decrease gradually from the middle plate to both sides, with the current collecting plate closest to the middle plate having the highest height and the current collecting plate farthest from the middle plate having the lowest height.

[0010] Preferably, the upper folding plate is arranged horizontally, and an obtuse angle is formed between the upper folding plate and the current collecting plate.

[0011] Preferably, a plurality of air-combing grooves are provided on the side of the upper folding plate away from the collecting plate body. The air-combing grooves are rectangular through grooves, one side of which passes through the edge of the upper folding plate. The plurality of air-combing grooves are evenly arranged along the length direction of the upper folding plate, thereby forming tooth-shaped notches on the edge of the upper folding plate. The length direction of the air-combing grooves is perpendicular to the length direction of the upper folding plate. The length of the air-combing grooves is equal to half the width of the upper folding plate, and the side of the air-combing grooves close to the collecting plate body is located directly above the lower folding plate.

[0012] Preferably, the main body of the collecting plate is a combination of a curved plate and a straight plate, the middle part of the main body is bent toward the lower folding plate, the bottom of the main body is a straight plate, a V-shaped groove is formed between the straight plate part of the main body and the lower folding plate, a collecting channel is formed between the bottom of the curved plate of the main body and the lower folding plate, and the top of the main body is tangent to the upper folding plate.

[0013] Preferably, a changing plate and a temperature sensing bag are provided on the collecting plate; in the initial state, the changing plate is arranged parallel to the upper folding plate, the changing plate covers the upper folding plate, the changing plate is a rectangular plate, one side of the changing plate is hinged to the connection between the upper folding plate and the collecting plate body, so that the changing plate can be opened and closed along the width direction of the upper folding plate, and the maximum opening and closing angle between the upper folding plate and the changing plate is 90 degrees.

[0014] The deflecting plate is provided with a limiting flow groove, and there are multiple limiting flow grooves. The positions of the limiting flow grooves correspond to the air combing grooves one by one, and the length of the limiting flow grooves is smaller than the length of the air combing grooves, and the length of the air combing grooves is twice the length of the limiting flow grooves. When the temperature of the air flow passing through the upper folding plate is normal, the lower end surface of the deflecting plate is close to the upper end surface of the upper folding plate. At this time, under the action of the limiting flow grooves, part of the air combing grooves are blocked, thereby reducing the flow rate of the inclined upward air flow and increasing the flow rate of the air flow in the horizontal direction.

[0015] Preferably, the temperature sensing capsule is a long strip capsule with a cavity inside, and the two side ends of the temperature sensing capsule are respectively fixed on the upper end surface of the deflection plate and the collecting plate body. The temperature sensing capsule is made of elastic rubber material and is filled with paraffin, which is initially in a solidified state.

[0016] Preferably, a curling plate is fixedly provided inside the temperature sensing bag; the curling plate is a metal sheet. In normal working state, the turning plate is in a horizontal state, and the curling plate is restricted by the solid paraffin and the temperature sensing bag and is in a power storage state; when the paraffin melts, the curling plate loses its restriction, and the curling plate curls in a direction away from the upper folding plate, so that the turning plate rotates to a vertical state.

[0017] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: By setting a guide ring, the outer ring height of the guide ring is made greater than or equal to the height of the collecting plate, thereby reducing the influence of the uncertainty of the reflux liquid trajectory on the internal temperature and airflow flow of the distillation tower. At the same time, the relative width of the upper fold plate and the lower fold plate is limited, and the possibility of the upper fold plate causing the airflow to return is reduced, so that the negative impact between the airflow and the reflux liquid that has been collected is reduced, and the lower fold plate is made to adapt to the position of the upper fold plate. While catching the flowing reflux liquid, the reflux liquid is allowed to flow stably into the recovery tank, which solves the technical problem in the prior art that the airflow is easily disturbed when passing through the collecting plate and blows towards the reflux liquid that has been collected, thereby affecting the refining efficiency, and achieves the technical effect of stabilizing the airflow, reducing the influence of the airflow on the reflux liquid, and making the reflux liquid more concentrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the vacuum distillation device for damping oil of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the guide ring of the vacuum distillation device for damping oil of the present invention; Figure 3 It is a front cross-sectional schematic diagram of a guide ring of a vacuum distillation device for damping oil of the present invention; Figure 4 It is a schematic diagram of the top view of the structure of the guide ring of the vacuum distillation device for damping oil of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the guide ring of the second embodiment of the vacuum distillation device for damping oil of the present invention; Figure 6 It is a front cross-sectional schematic diagram of a guide ring of a second embodiment of a vacuum distillation device for damping oil of the present invention; Figure 7 It is a top view schematic diagram of the upper folding plate of the third embodiment of the vacuum distillation device for damping oil of the present invention; Figure 8 This is a schematic diagram of the collector plate structure and gas flow direction of Example 3 of the vacuum distillation device for damping oil of the present invention; Fig. 9 This is a schematic structural diagram of a deflection plate of a fourth embodiment of a vacuum distillation device for damping oil according to the present invention; Fig.10 This is a schematic diagram of a horizontal state of a deflection plate of a fourth embodiment of a vacuum distillation device for damping oil of the present invention; Fig.11 This is a schematic diagram of a vertical state of a change-over plate of a fourth embodiment of a vacuum distillation device for damping oil of the present invention; Fig.12 This is a schematic diagram of the top view of the structure of the deflection plate of Example 4 of the vacuum distillation device for damping oil of the present invention.

[0019] In the figure: a distillation tower 100; a splitter tank 110; a riser 200; a reflux pipe 210; a reactor 300; a guide ring 400; a recovery tank 410; a guide hole 420; a vent 430; an intermediate plate 440; a collecting plate 500; an upper folding plate 510; an air combing tank 511; a lower folding plate 520; a collecting channel 521; a temperature sensing bag 530; a curling plate 531; paraffin 532; a turning plate 540; and a flow limiting tank 541. DETAILED DESCRIPTION

[0020] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0021] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] Embodiment 1 like Figures 1 to 4 As shown, the present application is a vacuum distillation device for damping oil, comprising a distillation tower 100, two reactors 300, a gas riser 200, and a flow splitter. The gas riser 200 is an inverted Y-shaped structure. The bottom of the distillation tower 100 is connected to the top of the gas riser 200. The gas riser 200 is composed of an upper main pipe and two lower branch pipes. The two outlets of the two branch pipes are respectively connected to the two reactors 300. The flow splitter is located near the bottom of the distillation tower 100. The bottom of the flow splitter is respectively connected to Two reflux pipes 210 are connected, and the two reflux pipes 210 extend into the two branch pipes of the riser 200 respectively; the flow splitting device includes a collecting plate 500, a guide ring 400, and two flow splitting grooves 110. The guide ring 400 is provided with a recovery groove 410, and the bottom of the recovery groove 410 is provided with two flow guide holes 420. The two flow splitting grooves 110 are located below the recovery groove 410, and the two flow splitting grooves 110 are connected to the two flow guide holes 420 respectively, and the two flow splitting grooves 110 are connected to the reflux pipes 210 respectively. Two reactors 300 are respectively located below the distillation tower 100. The collector plate 500 includes a main body, an upper folding plate 510 and a lower folding plate 520, wherein the upper folding plate 510 and the lower folding plate 520 are respectively arranged on the left and right sides of the main body, the upper folding plate 510 is fixed to the upper end of the main body, and the lower folding plate 520 is fixed to the lower end of the main body, and the angle between the main body and the horizontal plane is 60 degrees to 70 degrees; a V-shaped groove with an opening upward is formed between the bottom of the lower folding plate 520 and the bottom of the main body; a V-shaped groove with an opening downward is formed between the bottom of the upper folding plate 510 and the bottom of the main body; the cross-sectional length of the upper folding plate 510 is smaller than the cross-sectional length of the lower folding plate 520, and the cross-sectional length of the lower folding plate 520 is 1.5 to 5 times the cross-sectional length of the upper folding plate 510; The guide ring 400 is annular as a whole, and the lower end surface of the guide ring 400 is a horizontally arranged circular ring plate, and the annular center of the lower end surface of the guide ring 400 is a vent 430. The inner ring edge and the outer ring edge of the guide ring 400 are both provided with vertical side walls, wherein the height of the side wall of the outer ring is greater than the height of the side wall of the inner ring, and the two ends of the bottom of the collecting plate 500 are fixed to the top edge of the inner wall of the guide ring 400, and the height of the outer wall of the guide ring 400 is greater than or equal to the sum of the height of the inner wall and the height of the collecting plate 500; the recovery groove 410 is located between the inner wall and the outer wall of the guide ring 400; an intermediate plate 440 is horizontally arranged in the middle of the top of the inner wall of the guide ring 400, and the intermediate plate 440 is a straight plate with a V-shaped cross section, and the length direction of the intermediate plate 440 passes through the center of the vent 430, and the two ends of the length direction of the bottom of the intermediate plate 440 are fixed to the top of the inner wall of the guide ring 400.

[0024] There are multiple current collecting plates 500, which are arranged linearly along the radial direction of the vent 430 and symmetrically arranged on both sides of the length direction of the middle plate 440, wherein the lengths of the multiple current collecting plates 500 are adapted to the inner wall edge of the guide ring 400, and the reflux liquid can be introduced into the recovery tank 410; between adjacent current collecting plates 500, the end of the upper folding plate 510 away from the main body is located directly above the lower folding plate 520, so as to allow the reflux liquid falling on the upper folding plate 510 to slide off To the V-shaped groove formed between the lower folded plate 520 and the main body, so that the reflux liquid gathers in the V-shaped groove, and then is introduced into the recovery groove 410 through the V-shaped groove; the highest points of the two lower folded plates 520 on the adjacent sides of the middle plate 440 are located directly above the middle plate 440; the cross-sectional length of the upper folded plate 510 farthest from the middle plate 440 on both sides in the length direction is adapted to the inner side wall of the guide ring 400, and its edge is located directly above the inner circle edge of the recovery groove 410, which is used to guide the reflux liquid to fall into the recovery groove 410; During the operation of the refining device, the upward movement of the rising air flow is synchronized with the falling movement of the reflux liquid in the distillation tower 100, wherein the reflux liquid is guided by a plurality of current collecting plates 500 and an intermediate plate 440, and flows into the recovery tank 410 in a concentrated manner. At the same time, after the rising air flow passes through the vent 430, it moves upward along the lower folding plate 520 and the lower end surface of the main body of the current collecting plate 500, and rises to the distillation tower 100 through the upper folding plate 510 and the upper end surface of the main body. Since the inclination directions of the current collecting plates 500 on both sides of the intermediate plate 440 are symmetrically arranged, the rising air flow is divided to both sides, from A stable airflow trajectory is formed, which reduces the risk of the collecting plate 500 disturbing the airflow, and at the same time makes the falling trajectory and falling area of ​​the reflux liquid more stable, thereby improving the distillation efficiency; by limiting the height of the inner and outer side walls of the guide ring 400, and setting the relative sizes of the upper folding plate 510 and the lower folding plate 520, the amount of returned air is reduced when the airflow passes through the collecting plate 500, making the flow of the rising airflow smoother. At the same time, the risk of the mist particles in the rising airflow being absorbed by the reflux liquid is reduced, and the risk of the reflux liquid splashing caused by the rising airflow is also controlled, thereby further improving the quality of distillation.

[0025] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: In this embodiment, a guide ring 400 is provided so that the outer ring height of the guide ring 400 is greater than or equal to the height of the collecting plate 500, thereby reducing the influence of the uncertainty of the reflux liquid trajectory on the internal temperature and airflow flow of the distillation tower 100, and at the same time limiting the relative width of the upper fold plate 510 and the lower fold plate 520, thereby reducing the possibility of the upper fold plate 510 causing the airflow to return, thereby reducing the negative impact between the airflow and the reflux liquid that has been collected, and allowing the lower fold plate 520 to adapt to the position of the upper fold plate 510, catching the fallen reflux liquid and allowing the reflux liquid to flow stably into the recovery tank 410, thereby solving the technical problem in the prior art that the airflow is easily disturbed when passing through the collecting plate 500, blowing towards the reflux liquid that has been collected, and affecting the refining efficiency, and achieving the technical effect of stabilizing the airflow, reducing the influence of the airflow on the reflux liquid, and making the reflux liquid more concentrated.

[0026] Embodiment 2 In order to further improve the distillation efficiency, and considering that the upper folding plate 510 in the above-mentioned embodiment 1 reduces the influence on the return of the airflow, the return airflow still exists, and secondly, the mist particles in the rising airflow may form a small-scale cyclone at the bottom of the upper folding plate 510, resulting in premature cooling of the mist particles in the airflow, which affects the distillation effect, so it is necessary to improve the device, such as Figure 5 and Figure 6 As shown, the specific structure is as follows: The heights of the plurality of current collecting plates 500 decrease gradually from the middle plate 440 to both sides, with the current collecting plate 500 closest to the middle plate 440 having the highest height and the current collecting plate 500 farthest from the middle plate 440 having the lowest height; The upper folding plate 510 is horizontally arranged, and an obtuse angle is formed between the upper folding plate 510 and the current collecting plate 500.

[0027] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: In this embodiment, a horizontal upper folding plate 510 and highly stepped collecting plates 500 are arranged. After the airflow enters between the collecting plates 500 from the vent 430, it passes through the bottom of the connection between the upper folding plate 510 and the main body of the collecting plate 500, and flows in the horizontal direction under the action of the upper folding plate 510. At the same time, the height difference between adjacent collecting plates 500 is utilized to smoothly push the airflow toward the outer wall of the guide ring 400, thereby accelerating the flow of the reflux liquid above the adjacent upper folding plates 510, and further reducing the influence of the airflow on the falling of the reflux liquid droplets, thereby promoting the collection speed of the reflux liquid and improving the distillation efficiency.

[0028] Embodiment 3 Considering that in the above-mentioned embodiment 2, when the rising airflow flows faster, due to the movement of the airflow, vortices are easily generated on the V-shaped groove between the lower folding plate 520 and the main body of the collecting plate 500. Secondly, when the airflow passes through the bottom of the upper folding plate 510, it changes direction under the guidance of the upper folding plate 510. At the same time, the airflow speed may slow down during the horizontal movement of the airflow, and the airflow is completely pushed in the horizontal direction, so that the reflux liquid on the upper folding plate 510 can only move along the direction of the airflow. Since the reflux liquid itself has a certain viscosity and flows relatively slowly, when the reflux liquid flows to one side at the same time, the flowing reflux liquid is crowded in one place, which may cause the reflux liquid to affect the smoothness of the movement of the airflow. Therefore, it is necessary to improve the device, such as Figure 7 and Figure 8 As shown, the specific structure is as follows: A plurality of air-combing grooves 511 are provided on one side of the upper folding plate 510 away from the main body of the current collecting plate 500. The air-combing grooves 511 are rectangular through grooves. One side of the air-combing grooves 511 passes through the edge of the upper folding plate 510. The plurality of air-combing grooves 511 are evenly arranged along the length direction of the upper folding plate 510, thereby forming neat tooth-shaped notches on the edge of the upper folding plate 510. The length direction of the air-combing grooves 511 is perpendicular to the length direction of the upper folding plate 510. The length of the air-combing grooves 511 is equal to half the width of the upper folding plate 510. The side of the air-combing grooves 511 close to the main body of the current collecting plate 500 is located directly above the lower folding plate 520, thereby preventing droplets from falling directly from the vent 430. The main body of the collecting plate 500 is a combination of a curved plate and a straight plate. The middle part of the main body is bent toward the lower folding plate 520. The bottom of the main body is a straight plate. A V-shaped groove is formed between the straight plate part of the main body and the lower folding plate 520. A collecting channel 521 is formed between the bottom of the curved plate of the main body and the lower folding plate 520. The top of the main body is tangent to the upper folding plate 510.

[0029] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: In this embodiment, a curved collector plate 500 body is provided so that the connection between the collector plate 500 body and the upper folding plate 510 is smoothly transitioned, and a narrow and long collector channel 521 is formed between the lower folding plate 520 and the curved portion of the collector plate 500 body. Figure 8 As shown by the hollow arrow, when there is air flow, the air flow flows along the concave surface of the curvature direction of the collecting plate 500, and a channel with relatively close upper and lower ends and relatively loose in the middle is formed between adjacent collecting plates 500, so that it is difficult to form a vortex at the channel mouth of the collecting channel 521. After entering the collecting plate 500, the air flow velocity slows down due to the expansion of the space. When the air flow passes through the upper folding plate 510, the space shrinks, the air flow is concentrated, and the flow velocity increases; the toothed structure of the upper folding plate 510 divides the air flow direction into two directions, namely, inclined upward and horizontal, so that the flow direction of the reflux liquid on the upper folding plate 510 is more orderly, the flow of the reflux liquid is smoother, and the flow direction of the air flow is more stable. Secondly, the toothed edge of the upper folding plate 510 increases the overall length of the edge of the upper folding plate 510, and the reflux liquid has more falling space at the edge of the upper folding plate 510.

[0030] Embodiment 4 Considering the above embodiment, when the air flow temperature is too high, it means that the reaction in the reactor 300 is accelerating. At this time, the air flow should be allowed to enter the distillation tower 100 faster to prevent the high-temperature air flow from gathering at the bottom and increasing the internal pressure of the device, thereby causing unnecessary damage to the device. At the same time, the user should promptly check whether the working state of the reactor 300 is abnormal. Therefore, the device needs to be improved, such as Figures 9 to 12 As shown, the specific structure is as follows: A turning plate 540 and a temperature sensing bag 530 are provided on the current collecting plate 500; in the initial state, the turning plate 540 is arranged parallel to the upper folding plate 510, and the turning plate 540 covers the upper folding plate 510. The turning plate 540 is a rectangular plate, and one side of the turning plate 540 is hinged to the connection between the upper folding plate 510 and the main body of the current collecting plate 500, so that the turning plate 540 can be opened and closed along the width direction of the upper folding plate 510, and the maximum opening and closing angle between the upper folding plate 510 and the turning plate 540 is 90 degrees.

[0031] The deflection plate 540 is provided with a limiting flow groove 541, and there are a plurality of limiting flow grooves 541. The positions of the limiting flow grooves 541 correspond to the air combing grooves 511 one by one, and the length of the limiting flow grooves 541 is less than the length of the air combing grooves 511, and the length of the air combing grooves 511 is twice the length of the limiting flow grooves 541. When the temperature of the air flow passing through the upper folding plate 510 is normal, the lower end surface of the deflection plate 540 is in close contact with the upper end surface of the upper folding plate 510. At this time, under the action of the limiting flow grooves 541, the air combing grooves 511 are partially blocked, so that the flow rate of the air flow in the oblique upward direction is reduced, and the flow rate of the air flow in the horizontal direction is increased. The temperature sensing capsule 530 is a long strip capsule with a cavity inside. The two side ends of the temperature sensing capsule 530 are respectively fixed to the upper end surface of the deflection plate 540 and the main body of the current collecting plate 500. The temperature sensing capsule 530 is made of elastic rubber material with high temperature resistance, preferably silicone rubber; the temperature sensing capsule 530 is filled with high melting point paraffin 532. Within the normal temperature range of the airflow, the paraffin 532 is in a solidified state; since different types of wax have different melting points, and high melting point paraffin 532 is a prior art, the melting point of industrial wax can reach above 150 degrees Celsius, so it is not particularly limited here. The user can choose the type of paraffin 532 according to the needs of distillation. In this embodiment, polyethylene wax is preferred. The high melting point paraffin 532 is combined with the heat insulation of the temperature-resistant rubber, so that the temperature sensing capsule 530 can have different reactions to a variety of different temperatures, thereby increasing the reliability of the temperature sensing capsule 530 and extending its service life; A curling plate 531 is fixedly provided inside the temperature sensing bag 530; the curling plate 531 is a metal sheet. In normal working state, the turning plate 540 is in a horizontal state, and the curling plate 531 is restricted by the solid paraffin 532 and the temperature sensing bag 530, and is in a power storage state; when the paraffin 532 melts, the curling plate 531 loses its restriction, and the curling plate 531 curls in a direction away from the upper folding plate 510, so that the turning plate 540 rotates to a vertical state; preferably, the curling plate 531 is a shape memory metal, preferably a nickel-titanium alloy, and when the temperature of the curling plate 531 is high and reaches the transition temperature range, it can curl back to a curved shape.

[0032] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: In this embodiment, by providing the deflection plate 540 and the temperature-sensing capsule 530, when the temperature of the airflow passing through the upper folding plate 510 is abnormally high, the paraffin 532 inside the temperature-sensing capsule 530 melts, the curling plate 531 loses its restriction, and drives the deflection plate 540 to rotate to a vertical state. At this time, the direction of the airflow is as follows: Fig.11 As shown by the hollow arrows in the figure, the airflow is vertically gathered upward at the upper end of the collecting plate 500 and quickly enters the distillation tower 100, preventing the high-temperature airflow from gathering at the bottom and causing excessive pressure, which would damage the device. This buys time for the staff to check the reactor 300, and the staff has enough time to check the inside of the device.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vacuum distillation device for damping oil, comprising a distillation tower (100), two reaction kettles (300), a gas riser (200), and a flow splitter; the flow splitter comprises a collecting plate (500), a flow guide ring (400), and two flow splitters (110); a recovery groove (410) is provided in the flow guide ring (400); two flow guide holes (420) are provided at the bottom of the recovery groove (410); and the two flow splitters (110) are respectively connected to the two flow guide holes (420); It is characterized in that There are a plurality of current collecting plates (500), which are fixed to the middle of the guide ring. The current collecting plate (500) comprises a main body, an upper folding plate (510) and a lower folding plate (520), wherein the upper folding plate (510) and the lower folding plate (520) are respectively arranged on the left and right sides of the main body, the upper folding plate (510) is fixed to the upper end of the main body, and the lower folding plate (520) is fixed to the lower end of the main body, and a V-shaped groove with an opening facing upward is formed between the bottom of the lower folding plate (520) and the bottom of the main body; a groove with an opening facing downward is formed between the bottom of the upper folding plate (510) and the bottom of the main body; and the cross-sectional length of the upper folding plate (510) is smaller than the cross-sectional length of the lower folding plate (520).

2. The vacuum distillation device for damping oil according to claim 1, characterized in that: The guide ring (400) is annular as a whole, the lower end surface of the guide ring (400) is a horizontally arranged circular ring plate, the annular center of the lower end surface of the guide ring (400) is a vent (430), the inner ring edge and the outer ring edge of the guide ring (400) are both provided with vertical side walls, wherein the height of the side wall of the outer ring is greater than the height of the side wall of the inner ring, the two ends of the bottom of the collecting plate (500) are fixed to the top edge of the inner side wall of the guide ring (400), and the height of the outer side wall of the guide ring (400) is greater than or equal to the sum of the height of the inner side wall and the height of the collecting plate (500). The recovery groove (410) is located between the inner wall and the outer wall of the guide ring (400); an intermediate plate (440) is horizontally arranged in the middle of the top of the inner wall of the guide ring (400); the intermediate plate (440) is a straight plate with a V-shaped cross section, the length direction of the intermediate plate (440) passes through the center of the vent (430), and the two ends of the length direction of the bottom of the intermediate plate (440) are fixed to the top of the inner wall of the guide ring (400); the cross-sectional length of the lower folding plate (520) is 1.5 to 5 times the cross-sectional length of the upper folding plate (510).

3. The vacuum distillation device for damping oil according to claim 2, characterized in that: The plurality of current collecting plates (500) are linearly arranged along the radial direction of the vent (430), and the plurality of current collecting plates (500) are symmetrically arranged on both sides of the length direction of the middle plate (440), wherein the length of the plurality of current collecting plates (500) is adapted to the inner wall edge of the guide ring (400), and the reflux liquid can be introduced into the recovery tank (410); between adjacent current collecting plates (500), the end of the upper folding plate (510) away from the main body is located directly above the lower folding plate (520), so as to allow the reflux liquid that falls on the upper folding plate (510) to slide off The reflux liquid is collected in the V-shaped groove formed between the lower folding plate (520) and the main body, and then introduced into the recovery groove (410) through the V-shaped groove; the highest points of the two lower folding plates (520) on the adjacent sides of the middle plate (440) are located directly above the middle plate (440); the cross-sectional length of the upper folding plate (510) farthest from the middle plate (440) on both sides in the length direction is adapted to the inner side wall of the guide ring (400), and its edge is located directly above the inner circle edge of the recovery groove (410), so as to guide the reflux liquid to fall into the recovery groove (410).

4. The vacuum distillation device for damping oil according to claim 3, characterized in that: The heights of the plurality of current collecting plates (500) decrease in stages from the middle plate (440) to both sides, with the current collecting plate (500) closest to the middle plate (440) having the highest height and the current collecting plate (500) farthest from the middle plate (440) having the lowest height.

5. The vacuum distillation device for damping oil according to claim 4, characterized in that: The upper folding plate (510) is arranged horizontally, and an obtuse angle is formed between the upper folding plate (510) and the current collecting plate (500).

6. The vacuum distillation device for damping oil according to claim 5, characterized in that: A plurality of air-combing grooves (511) are provided on a side of the upper folding plate (510) away from the main body of the current collecting plate (500); the air-combing grooves (511) are rectangular through grooves; one side of the air-combing grooves (511) passes through the edge of the upper folding plate (510); the plurality of air-combing grooves (511) are evenly arranged along the length direction of the upper folding plate (510), thereby forming tooth-shaped notches on the edge of the upper folding plate (510); the length direction of the air-combing grooves (511) is perpendicular to the length direction of the upper folding plate (510); the length of the air-combing grooves (511) is equal to half the width of the upper folding plate (510); and the side of the air-combing grooves (511) close to the main body of the current collecting plate (500) is located directly above the lower folding plate (520).

7. The vacuum distillation device for damping oil according to claim 6, characterized in that: The main body of the current collecting plate (500) is a combination of a curved plate and a straight plate, the middle of the main body is bent toward one side of the lower folding plate (520), the bottom of the main body is a straight plate, a V-shaped groove is formed between the straight plate portion of the main body and the lower folding plate (520), a current collecting channel (521) is formed between the bottom of the curved plate of the main body and the lower folding plate (520), and the top of the main body is tangent to the upper folding plate (510).

8. The vacuum distillation device for damping oil according to claim 7, characterized in that: The current collecting plate (500) is provided with a deflection plate (540) and a temperature sensing capsule (530); in an initial state, the deflection plate (540) is arranged parallel to the upper folding plate (510), the deflection plate (540) covers the upper part of the upper folding plate (510), the deflection plate (540) is a rectangular plate, one side of the deflection plate (540) is hinged to the connection between the upper folding plate (510) and the main body of the current collecting plate (500), so that the deflection plate (540) can be opened and closed along the width direction of the upper folding plate (510), and the maximum opening and closing angle between the upper folding plate (510) and the deflection plate (540) is 90 degrees; The deflection plate (540) is provided with a limiting flow groove (541), and there are a plurality of limiting flow grooves (541). The positions of the limiting flow grooves (541) correspond to the air combing grooves (511) one by one, and the length of the limiting flow grooves (541) is less than the length of the air combing grooves (511). The length of the air combing grooves (511) is twice the length of the limiting flow grooves (541). When the temperature of the airflow passing through the upper folding plate (510) is normal, the lower end surface of the deflection plate (540) is in close contact with the upper end surface of the upper folding plate (510). At this time, under the action of the limiting flow grooves (541), the air combing grooves (511) are partially blocked, thereby reducing the flow rate of the airflow in an inclined upward direction and increasing the flow rate of the airflow in a horizontal direction.

9. The vacuum distillation device for damping oil according to claim 8, characterized in that: The temperature sensing capsule (530) is a long strip-shaped capsule body with a cavity inside. The two side ends of the temperature sensing capsule (530) are respectively fixed to the upper end surface of the deflection plate (540) and the main body of the current collecting plate (500). The temperature sensing capsule (530) is made of elastic rubber material. The temperature sensing capsule (530) is filled with paraffin (532), and the paraffin (532) is initially in a solidified state.

10. The vacuum distillation device for damping oil according to claim 9, characterized in that: A curling plate (531) is fixedly arranged inside the temperature sensing capsule (530); the curling plate (531) is a metal sheet; in a normal working state, the direction-changing plate (540) is in a horizontal state, and the curling plate (531) is restricted by the solid paraffin (532) and the temperature sensing capsule (530) and is in a power storage state; when the paraffin (532) melts, the curling plate (531) loses its restriction, and the curling plate (531) curls in a direction away from the upper folding plate (510), so that the direction-changing plate (540) rotates to a vertical state.

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