Light white oil separates isododecane rectifying column tray valve body and application thereof
By setting staggered valve body components on the distillation column trays, the problems of mist entrainment and poor downstream flow in the gas-liquid mass transfer process in the prior art are solved, achieving gas-liquid mass transfer with uniform thickness and improving the production efficiency and product purity of the distillation column.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HERUN TECH CO LTD
- Filing Date
- 2024-07-22
- Publication Date
- 2026-06-02
AI Technical Summary
In the existing distillation column, the amount of mist entrainment is difficult to control during the gas-liquid mass transfer process, resulting in poor performance. Furthermore, valve plates or floating valves can easily cause poor downstream flow, making it difficult to achieve uniform gas-liquid mass transfer thickness.
A tray valve body for a light white oil separation isododecane distillation column is designed. By setting non-corresponding valve bodies on the tray, including components such as insert tubes, ring plates, bell tubes, thin tubes, and clamping plates, trays A and B are formed in a staggered manner, realizing a gas-liquid mass transfer process of a set thickness.
It achieves gas-liquid mass transfer without mist entrainment or flooding, obtains uniform thickness gas-liquid mass transfer effect, and improves the production efficiency and product purity of the distillation column.
Smart Images
Figure CN118649434B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a tray valve body for a light white oil distillation column for isododecane separation, and more particularly to a structure of a tray valve body for a light white oil distillation column for isododecane separation. Specifically, this disclosure relates to a tray valve body for a light white oil distillation column for isododecane separation and its application. Background Technology
[0002] Light white oil is a white mineral oil that has undergone special deep refining. Its chemical structure includes alkanes, cycloalkanes, and aromatic hydrocarbons. The isododecane separated from light white oil possesses good chemical stability and excellent lubricating properties. Isododecane is widely used in many fields such as lubricants, rust inhibitors, plasticizers, and fuels. It is also widely used as a solvent and diluent in cosmetics and skincare products, and in coatings and paints to provide fast drying and good coating results. The main method for preparing isododecane is through distillation and hydrogenation of light white oil. This process is achieved through cracking, with the rectification stage being particularly crucial. Currently, the rectification stage utilizes a distillation column. Various systems for monitoring flow rates, heating, and control are installed on the column's sidewalls. These systems manage the material feed balance, column pressure, and the rate of rise of high-temperature steam to achieve an optimal production environment. The upper end of the distillation column is equipped with a light white oil feed pipe and a steam recovery and cooling system, while the lower end is connected to a steam generator and a light white oil outlet system via pipelines. Specifically, the distillation column consists of multiple layers of trays spaced at intervals from top to bottom. The distribution of these trays is such that one side of the first layer, which is roughly semi-circular, is connected to the distillation column... One side of the inner wall of the distillation column is fixedly connected, while the other side has a gap. An upwardly bent plate is installed on the upper part of the other side of a semi-circular tray. The other side of the second semi-circular tray is fixedly connected to the other side of the inner wall of the distillation column. A gap is left on one side of the semi-circular tray on the inner wall of the distillation column, and an upwardly bent plate is installed on the upper part of one side of the tray. Multiple trays are arranged in this manner. During distillation, light white oil flows downwards through the upward bends of each tray, forming a waterfall. The rising vapor from the lower part of the distillation column passes through the vapor, forming a gas-liquid mass transfer process. [This process can be repeated multiple times depending on factors such as the addition of other required process steps beforehand and the height of the column.] [Or single processing], then, the effluent from the distillation is hydrogenated in a hydrogenation reactor to convert unsaturated hydrocarbons and impurity molecules into cycloalkanes and alkyl compounds, yielding relatively pure isododecane. This process cannot control the thickness of the light white oil flowing down, and the penetration of the gas-liquid mass transfer process tends to concentrate at thinner points. The amount of mist entrained during penetration is difficult to control or flooding leads to poor results. Some also use valve plates or float valves. This method utilizes the valve plate or float valve mounting holes on the tray to achieve the gas-liquid mass transfer process between the light white oil and steam. This method is prone to causing poor flow down, and the amount of mist entrained during penetration is still difficult to control, resulting in poor results. Summary of the Invention
[0003] The purpose of this invention is to address the shortcomings of existing technologies by disclosing a tray valve body for a light white oil distillation column for isododecane separation and its application. This invention achieves a gas-liquid mass transfer process with a set thickness by setting non-corresponding valve bodies on the tray.
[0004] To achieve the inventive objective of this disclosure, the present application discloses the following technical solution:
[0005] A tray valve body for a light white oil separation isododecane distillation column includes a tube, an annular plate, a bell-shaped tube, a thin tube, a retaining plate, tray A, tray B, and a distillation column body. The upper end of the tube is fixedly connected to the inner opening of the annular plate, and the inner opening of the annular plate is provided with multiple equally spaced retaining grooves. The upper end of the bell-shaped tube, which is smaller at the top and larger at the bottom, is fixedly connected to the lower end of the thin tube, and multiple equally spaced retaining plates are provided on the lower outer edge of the thin tube. The retaining plates on the outer edge of the thin tube are engaged in the retaining grooves in the inner opening of the annular plate to form a valve body. Tray A and tray B are evenly provided with multiple mounting ports, and multiple trays A and B are arranged alternately from top to bottom in the distillation column body. The multiple mounting ports of tray A and tray B are staggered, and each mounting port of tray A and tray B is engaged with the upper outer edge of the valve body tube.
[0006] The light white oil separation isododecane distillation column tray valve body has three U-shaped rods with opening slots spaced apart at the middle opening of the annular plate. The outer ends of the three U-shaped rods are connected to the middle opening of the annular plate. The three U-shaped rods are pressed against the inner wall of the insertion tube by pressing down. The middle part of the three U-shaped rods forms a retaining groove. Three retaining plates are provided on the outer edge of the thin tube.
[0007] The tray valve body of the light white oil separation isododecane distillation column has a reinforcing plate on the lower part of the inner side of the clamping plate set on the outer edge of the thin tube, and the lower inner side of the reinforcing plate is fixedly connected to the upper outer edge of the trumpet tube.
[0008] The tray valve body of the light white oil separation isododecane distillation column has a thick pipe at the lower end of the trumpet tube.
[0009] The tray valve body of the light white oil separation isododecane distillation column has the same configuration for trays A and B except for the location of the mounting ports. Both trays include a crescent-shaped tray A, a crescent-shaped tray B, a side plate A, a side plate B, and a square plate. Multiple mounting ports are evenly distributed on crescent-shaped tray A. The outer surface of crescent-shaped tray A has an arc-shaped structure, with a raised edge A on the outer side. The inner surface of crescent-shaped tray A has a straight edge, and a support plate D is provided on the lower surface of the straight edge. On crescent-shaped tray B… Multiple mounting openings are evenly distributed on the upper side plate. The outer side of the crescent plate B has an arc-shaped structure, and a raised edge C is provided on the outer side of the arc-shaped crescent plate B. The inner side of the crescent plate B is a straight edge, and a support plate C is provided on the lower surface of the straight edge. Multiple mounting openings are evenly distributed on the side plate A. The outer side of the side plate A has an arc-shaped structure, and the inner side of the side plate A is a straight edge. A support plate B is provided on the lower surface of the straight edge. Both sides of the side plate A are straight edges. Multiple mounting openings are evenly distributed on the side plate B. The mounting openings are as follows: the outer side of side plate B has an arc-shaped structure, and the inner side of side plate B has a straight edge. A support plate A is provided on the lower surface of the straight edge. Both sides of side plate B are straight edges. Multiple mounting openings are evenly distributed on the square plate. The outer sides of the protruding edge A of crescent plate A and the outer sides of the protruding edge C of crescent plate B are respectively fixedly connected to the left and right sides of the inner wall of the distillation column. The outer sides of the protruding edge B of side plate A and the outer sides of the protruding edge D of side plate B are respectively fixedly connected to the front and rear sides of the inner wall of the distillation column. The two sides of side plate A press on the support plate C of crescent plate B and the support plate D of crescent plate A, respectively. The two sides of side plate B press on the support plate C of crescent plate B and the support plate D of crescent plate A, respectively. The four sides of square plate press on the middle of support plate D of crescent plate A, the middle of support plate C of crescent plate B, support plate A of side plate B and support plate B of side plate A to form tower plate A. The size of crescent plate A, crescent plate B, side plate A, side plate B and square plate of tower plate B can be adjusted according to the position of the installation port.
[0010] The tray valve body of the light white oil separation isododecane distillation column has end bends on both ends of the support plate C on the lower surface of the crescent plate B, and the end bends on both ends of the support plate D are located below the protruding edge A.
[0011] The application of the light white oil separation isododecane distillation column tray valve body describes a process where light white oil enters the distillation column through the feed pipe at the top and falls onto the uppermost tray A. Then, the light white oil passes through the gap between the lower part of the valve body's thin tube and the inner surface of the thick tube, forming a ring-shaped waterfall of liquid phase of a set thickness, which falls onto the lower tray B. At this time, the rising gas phase from the lower part of the distillation column enters the lowermost tray B. The rising gas phase then diffuses through the thick tube, trumpet tube, and thin tube at the installation port of the lower tray B, fully penetrating the falling ring-shaped waterfall of liquid phase. This gas-liquid mass transfer process, achieved through multiple staggered trays A and B, results in a set thickness of gas-liquid mass transfer.
[0012] The beneficial effects of this disclosure, based on the above information, are as follows:
[0013] The light white oil separation isododecane distillation column tray valve body and its application described in this disclosure integrate the design of the annular plate and U-shaped rod, and obtain them at low cost through stamping. After welding the annular plate and the insert tube, the U-shaped rod can be attached to the inner wall of the insert tube using an insert tool to form the outer tube of the valve body. The retaining plate is welded and fixed around the thin tube, and the reinforcing plate is fixedly connected by the trumpet tube, resulting in a high-strength integrated structure consisting of retaining plate, thin tube, trumpet tube, thick tube and reinforcing plate forming the inner tube of the valve body. The aforementioned inner and outer tubes of the valve body are easy to install and have high strength. After the inner tube of the valve body is installed in the outer tube of the valve body, the upper end of the thin tube is significantly higher than the annular plate attached to the tray. The equidistant gap between the outer side of the thick tube and the inner wall of the insert tube ensures that the sinking light white oil has a uniform thickness and good contact with the rising high-temperature steam, resulting in a better gas-liquid mass transfer process. This disclosure achieves the absence of mist entrainment or flooding in the gas-liquid mass transfer process by staggering the installation ports of tray A and tray B. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the valve body structure disclosed herein;
[0015] Figure 2 This is a schematic diagram of the three-dimensional assembly structure of the valve body disclosed herein;
[0016] Figure 3 This is a schematic diagram of the annular plate structure of the valve body disclosed herein;
[0017] Figure 4 This is a schematic diagram of the three-dimensional installation structure inside the distillation column disclosed herein;
[0018] Figure 5 This is a schematic diagram of the structure of tray A disclosed herein;
[0019] Figure 6 This is a schematic diagram of the structure of tray B disclosed herein;
[0020] Figure 7 This is a schematic diagram of the assembly structure of tray A disclosed herein;
[0021] Figure 8 This is a schematic diagram of the three-dimensional structure of side plate B disclosed herein;
[0022] Figure 9 This is a schematic diagram of the three-dimensional structure of the crescent plate B disclosed herein;
[0023] In the diagram: 1. Ring plate; 2. U-shaped rod; 3. Insert tube; 4. Clamping plate; 5. Thin tube; 6. Reinforcing plate; 7. Trumpet tube; 8. Thick tube; 9. Slot; 10. Distillation column body; 11. Plate A; 12. Plate B; 13. Mounting port; 14. Raised edge A; 15. Crescent plate A; 16. Raised edge B; 17. Side plate A; 18. Crescent plate B; 19. Raised edge C; 20. Square plate; 21. Raised edge D; 22. Side plate B; 23. Support plate A; 24. Support plate B; 25. Support plate C; 26. Support plate D; 27. End bend. Detailed Implementation
[0024] The preferred embodiments of this disclosure will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the inventive objectives, features, and advantages of this disclosure. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of this disclosure, but are merely illustrative of possible implementations of the technical solutions disclosed herein.
[0025] Combined with appendix Figures 1 to 9 The light white oil separation isododecane distillation column tray valve body described herein includes a tube 3, an annular plate 1, a bell-shaped tube 7, a thin tube 5, a retaining plate 4, a column tray A11, a column tray B12, and a distillation column body 10. The upper end of the tube 3 is fixedly connected to the inner opening of the annular plate 1, and the inner opening of the annular plate 1 is provided with multiple equally spaced retaining grooves 9. The upper end of the bell-shaped tube 7, which is smaller at the top and larger at the bottom, is fixedly connected to the lower end of the thin tube 5. A thick tube 8 is provided at the lower end of the bell-shaped tube 7, and multiple equally spaced retaining plates 4 are provided on the lower outer edge of the thin tube 5. The retaining plates 4 on the outer edge of the thin tube 5 are engaged in the retaining grooves 9 at the inner opening of the annular plate 1 to form a valve body. Multiple installation ports 13 are evenly provided on the column tray A11, and multiple installation ports 13 are evenly provided on the column tray B12. The distillation column body 10 is provided with multiple mounting ports 13. Multiple layers of trays A11 and B12 are arranged alternately from top to bottom, that is, one layer of tray A11, one layer of tray B12, another layer of tray A11, and another layer of tray B12. The multiple mounting ports 13 of tray A11 and the multiple mounting ports 13 of tray B12 are staggered. That is, the mounting port 13 of tray A11 corresponds to the plate of the lower adjacent tray B12 without mounting port, and the mounting port 13 of tray B12 corresponds to the plate of the lower adjacent tray A11 without mounting port. Each mounting port 13 of tray A11 and tray B12 is respectively engaged with the upper outer edge of the valve body insertion tube 3.
[0026] Combined with appendix Figures 1 to 4Three U-shaped rods 2 with openings spaced apart at the middle opening of the ring plate 1 are provided. The outer ends of the three U-shaped rods 2 with openings are connected to the middle opening of the ring plate 1 respectively. The three U-shaped rods 2 with openings are pressed down and attached to the inner wall of the insertion tube 3. The middle part of the three U-shaped rods 2 respectively forms a slot 9. There are three clamping plates 4 provided on the outer edge of the thin tube 5. The lower inner part of the clamping plate 4 provided on the outer edge of the thin tube 5 is provided with a reinforcing plate 6. The lower inner part of the reinforcing plate 6 is fixedly connected to the upper outer edge of the trumpet tube 7.
[0027] Combined with appendix Figures 3 to 9Tower tray A11 and tower tray B12 are identical in configuration except for the position of the mounting openings 13. Both include a crescent-shaped plate A15, a crescent-shaped plate B18, a side plate A17, a side plate B22, and a square plate 20. Multiple mounting openings 13 are evenly distributed on the crescent-shaped plate A15. The outer surface of the crescent-shaped plate A15 has an arc-shaped structure, and a raised edge A14 is provided on the outer surface of the arc-shaped plate A15. The inner side of the crescent-shaped plate A15 has a straight edge, and a support plate D26 is provided on the lower surface of the straight edge. The ends of the support plate D26 are bent upwards below the raised edge A14, and the two bent ends are connected to the lower surface of the raised edge A14 to increase strength. Multiple mounting openings 13 are evenly distributed on the crescent-shaped plate B18. The outer surface of the crescent-shaped plate B18 has an arc-shaped structure, and a raised edge C19 is provided on the outer surface of the arc-shaped plate B18. The inner side of the crescent-shaped plate B18 is a straight edge, and a support plate C25 is provided on the lower surface of the straight edge. The support plate C25 on the lower surface of the crescent-shaped plate B18 has end bends 27 at both ends, which are connected to the lower surface of the protruding edge C19 to increase strength. Multiple mounting holes 13 are evenly distributed on the side plate A17. The outer side of the side plate A17 has an arc-shaped structure, and the inner side of the side plate A17 is a straight edge. A support plate B24 is provided on the lower surface of the straight edge. Both sides of the side plate A17 are straight edges. Multiple mounting holes 13 are evenly distributed on the side plate B22. The outer side of the side plate B22 has an arc-shaped structure, and the inner side of the side plate B22 is a straight edge. A support plate A23 is provided on the lower surface of the straight edge. Both sides of the side plate B22 are straight edges. Multiple mounting holes 13 are evenly distributed on the square plate 20.The outer sides of the protruding edge A14 of crescent plate A15 and the outer sides of the protruding edge C19 of crescent plate B18 are respectively fixedly connected to the left and right sides of the inner wall of the distillation column body 10. [Connection holes can be provided near the outer side of the protruding edge A14 of crescent plate A15, and near the outer side of the protruding edge C19 of crescent plate B18. These connection holes are used to connect to the annular mounting plate on the inner surface of the distillation column body 10. Alternatively, the outer side of the protruding edge A14 of crescent plate A15 can be fixedly connected to the inner wall of the distillation column body 10.] A connecting plate is provided to connect to the inner surface of the distillation column body 10. A connecting plate is also provided on the lower outer side of the protruding edge C19 of the crescent plate B18 to connect to the inner surface of the distillation column body 10. The outer sides of the protruding edges B16 of side plate A17 and D21 of side plate B22 are respectively fixedly connected to the front and rear sides of the inner wall of the distillation column body 10. [A connecting hole can be provided near the outer side of the protruding edge B16 of side plate A17, and a connecting hole can be provided near the outer side of the protruding edge D21 of side plate B22.] A connecting hole is provided, which is used to connect to the annular mounting plate on the inner surface of the distillation column body 10. Similarly, connecting plates can be provided on the outer sides of the raised edge B16 and the raised edge D21, respectively, and connected to the inner surface of the distillation column body 10. The two sides of the side plate A17 press on the support plate C25 of the crescent plate B18 and the support plate D26 of the crescent plate A15, respectively. The two sides of the side plate B22 press on the support plate C25 of the crescent plate B18, respectively. The square plate 20 is placed on the support plate D26 of the crescent plate A15, and its four sides press against the middle of the support plate D26 of the crescent plate A15, the middle of the support plate C25 of the crescent plate B18, the support plate A23 of the side plate B22, and the support plate B24 of the side plate A17 to form the tower plate A11; the crescent plate A15, crescent plate B18, side plate A17, side plate B22, and square plate 20 on the tower plate B12 can be adaptively adjusted in size according to the position of the mounting opening 13.
[0028] The use of the tray valve body of the light white oil separation isododecane distillation column described in this disclosure, in conjunction with the attached... Figures 1 to 9Light white oil enters the distillation column 10 through the feed pipe at the top of the column body 10, and then falls onto the uppermost tray A11 inside the distillation column. Due to the raised edges C19, A14, D21, and B16 around the tray A11, and the plane formed by the crescent plates B18, A15, B22, A17, and the upper surface of the square plate 20, the light white oil is evenly distributed on the upper surface of the tray A11 [a very small amount of light white oil flows into the next tray B12 through the gaps between the trays]. The light white oil accumulates at the valve body of the tray A11, and then passes around the thicker tube 8 below the outer edge of the thin tube 5 of the valve body and the outer edge of the insertion tube 3. The gaps between the sections form an annular waterfall of liquid phase of a set thickness, which falls onto the lower tray B12. At this time, the rising gas phase from the lower part of the distillation column body 10 enters the lowest tray B12 inside the distillation column body 10. The rising gas phase rises sequentially through the lower multi-layer trays B12 and A11. Subsequently, the light white oil meets the high-temperature steam. The high-temperature steam enters the coarse tube 8, the trumpet tube 7 and the fine tube 5 at the installation port 13 and diffuses and fully penetrates the falling annular waterfall of liquid phase. This gas-liquid mass transfer process is repeated multiple times, so that the light white oil can have a sufficient gas-liquid mass transfer process. Since the gap between the outer edge of the coarse tube 8 and the lower inner wall of the insertion tube 3 is a fixed structure, a stable multi-layer gas-liquid mass transfer process of a set thickness is obtained.
[0029] The preferred embodiments of this disclosure have been described in detail above. However, it should be understood that after reading the foregoing teachings of this disclosure, those skilled in the art can make various alterations or modifications to the scope of protection of this disclosure. These equivalent forms also fall within the scope defined by the appended claims.
[0030] The parts not detailed in this disclosure are prior art.
Claims
1. A tray valve body for a light white oil separation isododecane distillation column, comprising a tube (3), an annular plate (1), a bell-shaped tube (7), a thin tube (5), a retaining plate (4), a tray A (11), a tray B (12), and a distillation column body (10), characterized in that: The upper end of the insertion tube (3) is fixedly connected to the inner opening of the ring plate (1), and the inner opening of the ring plate (1) is provided with multiple equally spaced slots (9); the upper end of the horn tube (7), which is smaller at the top and larger at the bottom, is fixedly connected to the lower end of the thin tube (5), and multiple equally spaced clamping plates (4) are provided on the lower outer edge of the thin tube (5); the clamping plates (4) on the outer edge of the thin tube (5) are clamped in the slots (9) of the inner opening of the ring plate (1) to form a valve body; multiple installation ports are evenly provided on the tower plate A (11). (13) Multiple mounting ports (13) are evenly provided on the tray B (12). Multiple trays A (11) and B (12) are arranged alternately from top to bottom in the body of the distillation column (10). The multiple mounting ports (13) of tray A (11) and the multiple mounting ports (13) of tray B (12) are staggered. Each mounting port (13) of tray A (11) and tray B (12) is respectively connected to the upper outer edge of the valve body insert (3). A thick pipe (8) is provided at the lower end of the horn tube (7).
2. The tray valve body of the light white oil separation isododecane distillation column according to claim 1, characterized in that: Three U-shaped rods (2) are provided at intervals in the middle of the ring plate (1). The outer ends of the three U-shaped rods (2) are connected to the middle of the ring plate (1). The three U-shaped rods (2) are pressed against the inner wall of the insertion tube (3). The middle parts of the three U-shaped rods (2) form slots (9). There are three clamping plates (4) on the outer edge of the thin tube (5).
3. The tray valve body of the light white oil separation isododecane distillation column according to claim 1 or 2, characterized in that: A reinforcing plate (6) is provided on the lower inner side of the clamping plate (4) set on the outer edge of the thin tube (5). The lower inner side of the reinforcing plate (6) is fixedly connected to the upper outer edge of the horn tube (7).
4. The tray valve body of the light white oil separation isododecane distillation column according to claim 1, characterized in that: Tower plate A (11) and tower plate B (12) are identical except for the location of the mounting openings (13). Both include crescent plate A (15), crescent plate B (18), side plate A (17), side plate B (22), and square plate (20). Multiple mounting openings (13) are evenly distributed on crescent plate A (15). The outer side of crescent plate A (15) is an arc-shaped structure. A raised edge A (14) is provided on the outer side of the arc-shaped crescent plate A (15). The inner side of crescent plate A (15) is a straight edge. A support plate D (26) is provided on the lower surface of the straight edge. Multiple mounting openings (13) are evenly distributed on crescent plate B (18). The outer side of crescent plate B (18) is... The part has an arc-shaped structure. A raised edge C (19) is provided on the outside of the crescent plate B (18) of the arc-shaped structure. The inside of the crescent plate B (18) is a straight edge. A support plate C (25) is provided on the lower surface of the straight edge. Multiple mounting holes (13) are evenly distributed on the side plate A (17). The outside of the side plate A (17) is an arc-shaped structure. The inside of the side plate A (17) is a straight edge. A support plate B (24) is provided on the lower surface of the straight edge. Both sides of the side plate A (17) are straight edges. Multiple mounting holes (13) are evenly distributed on the side plate B (22). The outside of the side plate B (22) is an arc-shaped structure. The inside of the side plate B (22) is a straight edge. A support plate A (23) is provided on the lower surface of the straight edge, and the two sides of the side plate B (22) are straight edges; multiple mounting holes (13) are evenly distributed on the square plate (20); the outer side of the protruding edge A (14) of the crescent plate A (15) and the outer side of the protruding edge C (19) of the crescent plate B (18) are respectively fixedly connected to the left and right sides of the inner wall of the distillation column body (10); the outer side of the protruding edge B (16) of the side plate A (17) and the outer side of the protruding edge D (21) of the side plate B (22) are respectively fixedly connected to the front and rear sides of the inner wall of the distillation column body (10); the two sides of the side plate A (17) press on the support plate C (25) of the crescent plate B (18) and the support plate A (15) of the crescent plate B (15). On the tray D (26), the two sides of the side plate B (22) press on the tray C (25) of the crescent plate B (18) and the tray D (26) of the crescent plate A (15), respectively. The four sides of the square plate (20) press on the middle of the tray D (26) of the crescent plate A (15), the middle of the tray C (25) of the crescent plate B (18), the tray A (23) of the side plate B (22), and the tray B (24) of the side plate A (17) to form the tower plate A (11). The crescent plate A (15), crescent plate B (18), side plate A (17), side plate B (22) and square plate (20) of the tower plate B (12) can be adjusted in size according to the position of the installation port (13).
5. The tray valve body of the light white oil separation isododecane distillation column according to claim 4, characterized in that: The support plate C (25) on the lower part of the crescent plate B (18) has an end bend (27) at both ends, and the end bends (27) at both ends of the support plate D (26) are located below the protruding edge A (14).
6. The application of a tray valve body for a light white oil separation isododecane distillation column as described in any one of claims 1 to 5, characterized in that: Light white oil enters the distillation column (10) through the feed pipe at the top of the column body (10) and falls onto the uppermost tray A (11) inside the distillation column (10). Then, the light white oil passes through the gap between the lower part of the valve body thin tube (5) and the inner surface of the insert tube (3) to form a ring-shaped waterfall liquid phase of a set thickness, which falls onto the lower tray B (12). At this time, the rising gas phase at the bottom of the distillation column (10) enters the lowermost tray B (12) inside the distillation column (10). The rising gas phase passes through the lower tray B (12) and enters the thick tube (8), trumpet tube (7) and thin tube (5) at the installation port (13), diffuses and fully penetrates the falling ring-shaped waterfall liquid phase. The gas-liquid mass transfer process of a set thickness is obtained through the multi-layer staggered tray A (11) and tray B (12).