Efficient fractionating tower tray for ethyl chloroacetate rectification

Abstract

The utility model relates to the technical field of fractionating tower trays, in particular to an efficient fractionating tower tray for ethyl chloroacetate rectification, which comprises a fixedly arranged upper tower drum, a liquid inlet pipe is mounted on the outer side wall of the left side of the lower part of the upper tower drum, and the tail end of the liquid inlet pipe is horizontally rightward and fixedly connected onto the outer side wall of the upper tower drum in a sealing manner; the interior of the liquid inlet pipe is communicated with an upper cavity of the upper tower drum through a liquid inlet, the outer side wall of the lower portion of the upper tower drum is sealed and movably connected to the outer side wall of the upper portion of the lower tower drum in a sleeving mode, a coaxial fluted disc is integrally formed and fixed to the outer side wall of the upper portion of the lower tower drum, and a gas-liquid mixing assembly is installed in a lower cavity of the lower tower drum. Through the structural design that the upper tower drum is sleeved with the lower tower drum and the lower tower drum can rotate circumferentially, and in combination with the arrangement of the vertical scrapers, the vertical scrapers can rotate along with the lower tower drum to scrape the liquid inlet, so that the materials near the liquid inlet are prevented from being accumulated and blocked, the liquid is ensured to smoothly enter the upper tower drum, and the stability and continuity of the fractionation process are maintained.

Description

Technical Field

[0001] This utility model relates to the field of fractionation tower tray technology, and in particular to high-efficiency fractionation tower trays for ethyl chloroacetate distillation. Background Technology

[0002] In the production of ethyl chloroacetate, distillation is a key step in achieving product purification and separation, and the performance of the distillation tray, as the core internal component of the distillation equipment, plays a decisive role in the distillation effect.

[0003] Traditional distillation trays typically use simple baffles or guide plates as auxiliary structures. In addition, the auxiliary structures of traditional trays (such as baffles) are mostly fixed installations, requiring the entire tray to be disassembled for maintenance, which makes maintenance cumbersome.

[0004] Some new improved structures have also been proposed in the prior art. According to the search, a fractionation tower tray disclosed in the patent document with patent application number CN202320107478.9 has the following main structure: the device body, the main mechanism, the tray shell, the guide plate, the discharge pipe, the nozzle, the pipeline mechanism, the mounting block, the exhaust hole, the discharge hole and other main components.

[0005] The application details reveal the following problems with existing patents used for the distillation and fractionation of ethyl chloroacetate:

[0006] Existing fractionation tower trays use a piping system with vent holes at the top and guide holes at the bottom. This structure makes it easy for gas-liquid separation to be incomplete. Gas can easily carry liquid droplets into the vent holes, resulting in the continuous mixing of liquid phase materials into the gas phase, which can easily lead to cross-contamination and affect the separation purity.

[0007] Because ethyl chloroacetate has a high viscosity, the liquid tends to adhere to the edge of the orifice when it flows through the orifice. This is especially true when the material contains polymers or impurities, which can easily cause blockages and make cleaning of the inside of the pipe system inconvenient.

[0008] Based on this, this utility model designs a small tray structure specifically for the efficient fractionation of ethyl chloroacetate, so as to achieve efficient separation for enterprises and facilitate cleaning, thereby better solving the problems existing in the prior art. Utility Model Content

[0009] To solve one of the aforementioned technical problems, the present invention employs the following technical solution: a high-efficiency fractionation tray for ethyl chloroacetate distillation, comprising a fixedly installed upper column, an inlet pipe installed on the lower left outer wall of the upper column, the top of the inlet pipe being connected to the drain port of the upper fractionation tray, the end of the inlet pipe being horizontally to the right and sealed and fixedly connected to the outer wall of the upper column, the interior of the inlet pipe being connected to the upper cavity of the upper column through an inlet, the lower outer wall of the upper column being sealed and movably fitted onto the upper outer wall of the lower column, a coaxial toothed disc integrally formed and fixed on the upper outer wall of the lower column, the top of the coaxial toothed disc abutting against the bottom of the upper column, the lower column being fixedly installed vertically and freely rotating circumferentially, and a gas-liquid mixing assembly installed in the lower cavity of the lower column.

[0010] Based on any of the above technical solutions, a further optimization is made as follows: the gas-liquid mixing assembly includes an internal tray fixedly installed at the top opening of the lower column, the top of the internal tray being lower than the bottom of the liquid inlet. An overflow baffle is fixed on the right side of the top of the internal tray, which is used to block the liquid entering to its left and to overflow to the right when it is also higher than its top. Several one-way gas valves are installed on the surface of the internal tray on the left side of the overflow baffle, each of which is used to bubble the high-pressure gas flowing upward in the lower cavity into the upper cavity. A liquid one-way valve is installed on the surface of the internal tray on the right side of the overflow baffle, which is used to direct the liquid accumulated above it downward into the lower cavity and continue to flow into the fractionation tray of the lower layer.

[0011] Based on any of the above technical solutions, a further optimization is made as follows: several vertical scrapers are fixed at even intervals along the circumference of the top of the lower column, and the outer side wall of the vertical scrapers abuts against the inner side wall of the upper cavity; each vertical scraper scrapes material from the liquid inlet when it rotates along the fixed axis of the lower column.

[0012] Based on any of the above technical solutions, a further optimization is made as follows: the top of each of the vertical scrapers is fixed to the bottom of the upper ring, and the outer wall of the upper ring is engaged and pressed against the inner wall of the upper cavity.

[0013] Based on any of the above technical solutions, a further optimization is made by providing a recessed bend at the bottom of the inlet pipe.

[0014] Based on any of the above technical solutions, a further optimization is made: the upper tower is fixed-axis set and rotates on a fixed axis under the driving action of external equipment or by human rotation.

[0015] Based on any of the above technical solutions, a further optimization is made: the bottom surface of the upper tower, the top surface and the bottom surface of the coaxial gear disk are all smooth planes formed by polishing and grinding.

[0016] Based on any of the above technical solutions, a further optimization is made by installing a wear-resistant sealing ring on the upper outer wall of the lower tower, the wear-resistant sealing ring being used to achieve a tight sealing fit between the outer wall of the lower tower and the inner wall of the upper tower.

[0017] Based on any of the above technical solutions, a further optimization is made: the space to the left of the overflow baffle serves as a mixing area for low-temperature liquid and high-temperature gas.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model, through the structural design of the upper and lower column cylinders being connected and the lower column cylinder being able to rotate circumferentially, combined with the setting of the vertical scraper, allows the vertical scraper to rotate with the lower column cylinder to scrape the material at the liquid inlet, avoiding material accumulation and blockage near the liquid inlet, ensuring that the liquid smoothly enters the upper column cylinder, and maintaining the stability and continuity of the fractionation process.

[0020] 2. In the gas-liquid mixing assembly of this utility model, the overflow baffle uses its left side space as a mixing area for low-temperature liquid and high-temperature gas. With the help of a one-way gas valve to supply high-pressure gas to bubble upward into the upper cavity, the low-temperature liquid and high-temperature gas can be fully mixed and heat exchanged in this area, which enhances the gas-liquid mass transfer effect, improves the fractionation efficiency, and at the same time uses the temperature difference to realize energy recovery and reduce energy loss.

[0021] 3. This utility model has a sinking bend at the bottom of the liquid inlet pipe, which can form a liquid seal in the bend of the liquid inlet pipe, effectively preventing the high-pressure gas in the lower chamber of the lower column from backflowing upward through the liquid inlet pipe, ensuring the safety and stability of the liquid input, avoiding abnormal fractionation process or safety hazards caused by gas backflow, and has a simple structure and low cost.

[0022] 4. This utility model installs a wear-resistant sealing ring on the outer wall of the upper part of the lower tower, which can achieve a tight seal between the outer wall of the lower tower and the inner wall of the upper tower. While ensuring that the lower tower can rotate circumferentially, the elastic deformation of the wear-resistant sealing ring fills the gap, preventing liquid leakage in the upper cavity. This solves the sealing problem of the movable connection structure. In addition, the wear-resistant material extends the service life of the sealing ring, reduces the maintenance frequency, and improves the reliability and stability of the equipment. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0024] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0025] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0026] Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention.

[0027] Figure 4 for Figure 3 A top-view structural diagram.

[0028] Parts list: 1. Upper column; 2. Liquid inlet pipe; 3. Lower column; 4. Coaxial geared disc; 6. Internal tray; 7. Overflow baffle; 8. One-way gas valve; 9. Liquid one-way valve; 10. Vertical scraper; 11. Upper ring; 12. Lower bend section; 13. Wear-resistant sealing ring. Detailed Implementation

[0029] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-4 As shown in the image.

[0030] Example 1: A high-efficiency fractionation tray for ethyl chloroacetate distillation includes a fixed upper column 1. A liquid inlet pipe 2 is installed on the lower left outer wall of the upper column 1. The top of the liquid inlet pipe 2 is connected to the drain port of the upper fractionation tray. The end of the liquid inlet pipe 2 is horizontally to the right and sealed and fixed to the outer wall of the upper column 1. The interior of the liquid inlet pipe 2 is connected to the upper cavity of the upper column 1 through a liquid inlet. The lower outer wall of the upper column 1 is sealed and movably sleeved on the upper outer wall of the lower column 3. A coaxial toothed disk 4 is integrally formed and fixed on the upper outer wall of the lower column 3. The top of the coaxial toothed disk 4 abuts against the bottom of the upper column 1. The lower column 3 is fixed in the vertical direction and rotates freely in the circumferential direction. A gas-liquid mixing assembly is installed in the lower cavity of the lower column 3.

[0031] The lower outer wall of the upper column 1 is sealed and movably fitted onto the upper outer wall of the lower column 3. The lower column 3 is fixed vertically but can rotate freely circumferentially. The top of the coaxial gear disk 4 on its upper outer wall abuts against the bottom of the upper column 1, providing support. The gas-liquid mixing assembly in the lower cavity of the lower column 3 is used to achieve gas-liquid mixing.

[0032] The liquid inlet pipe 2 allows the liquid from the upper tray to stably enter the upper column 1. The sleeved structure between the upper column 1 and the lower column 3, combined with the coaxial toothed disc 4, ensures stable installation of the upper column 1 and allows the lower column 3 to rotate circumferentially, providing a structural basis for subsequent gas-liquid mixing and scraping operations. The liquid inlet pipe 2 enables the input of liquid; the connection structure between the upper column 1 and the lower column 3 serves both as support and allows rotation, while the gas-liquid mixing assembly is the key component for gas-liquid contact and mixing during fractionation. The sleeved structure between the upper column 1 and the lower column 3, with the lower column 3 allowing for circumferential rotation, facilitates scraping and thorough gas-liquid mixing.

[0033] The lower outer wall of the upper column 1 is installed on the upper outer wall of the lower column 3 via a sealed movable sleeve. The two are supported and positioned by a coaxial geared disc 4 (the top surface of the coaxial geared disc 4 abuts against the bottom surface of the upper column 1). The lower column 3 is fixed in the vertical direction and can rotate freely in the circumferential direction. When the lower column 3 is rotated by external drive or process requirements, the vertical scraper 9 fixed at its top (the outer wall of which abuts against the inner wall of the upper column 1) rotates synchronously with the lower column 3 to scrape the material in the area near the liquid inlet. At the same time, the gas-liquid mixing components inside the lower column 3 (built-in tray 5, overflow baffle 6, one-way gas valve 7, etc.) generate dynamic disturbances with rotation, which enhances gas-liquid contact.

[0034] Based on any of the above technical solutions, a further optimization is made as follows: the gas-liquid mixing assembly includes an internal tray 5 fixedly installed at the top opening of the lower column 3. The top of the internal tray 5 is lower than the bottom of the liquid inlet. An overflow baffle 6 is fixed on the right side of the top of the internal tray 5. The overflow baffle 6 is used to block the liquid entering to its left and to overflow to the right when the liquid level is higher than its top. Several one-way gas valves 7 are installed on the surface of the internal tray 5 on the left side of the overflow baffle 6. Each one-way gas valve 7 is used to bubble the high-pressure gas flowing upward in the lower cavity into the upper cavity. A liquid one-way valve 8 is installed on the surface of the internal tray 5 on the right side of the overflow baffle 6. The liquid one-way valve 8 is used to let the liquid accumulated above it flow downward into the lower cavity and continue to flow to the fractionation tray of the lower layer.

[0035] Liquid enters the upper chamber of the upper column 1 through the inlet pipe 2. Since the top of the built-in tray 5 is lower than the bottom of the inlet, the liquid first falls onto the surface of the built-in tray 5.

[0036] The overflow baffle 6 is fixed to the top right side of the built-in tray 5, forming a liquid retention area on the left side: when the liquid level on the left side is lower than the top of the overflow baffle 6, the liquid is blocked on the left side; when the liquid level exceeds the top of the baffle, the liquid overflows to the right side.

[0037] A one-way gas valve 7 is installed on the surface of the built-in tray 5 on the left side of the overflow baffle 6. The high-pressure gas in the lower cavity bubblees upward into the upper cavity through the one-way gas valve 7. The bubbles pass through the liquid layer retained on the left side, achieving gas-liquid contact mixing.

[0038] The overflowing liquid accumulates above the liquid check valve 8. When the liquid pressure reaches the threshold, the liquid check valve 8 opens, and the liquid flows downward into the lower chamber of the lower column 3 and continues to flow into the lower fractionation tray.

[0039] Based on any of the above technical solutions, a further optimization is made as follows: several vertical scrapers 9 are fixed at even intervals along the circumference of the top of the lower tower 3, and the outer side wall of the vertical scraper 9 abuts against the inner side wall of the upper cavity; each vertical scraper 9 scrapes material from the liquid inlet when it rotates along the fixed axis with the lower tower 3.

[0040] Overflow baffle 6 forces the liquid to stagnate on the left side, prolonging the contact time between the low-temperature liquid and the high-temperature gas (bubbled through one-way gas valve 7). At the same time, the turbulence formed during the rising of the bubbles increases the mass transfer area, enhancing the heat and mass exchange during the fractionation process.

[0041] The clearly defined mixing zone (to the left of overflow baffle 6) design avoids insufficient gas-liquid contact caused by rapid liquid flow, making it particularly suitable for systems requiring efficient mass transfer (such as the separation of components with similar boiling points).

[0042] The liquid check valve 8 automatically controls the downward flow of liquid based on the liquid level on the right side. This prevents excessive liquid accumulation on the right side from affecting the stability of the liquid level in the gas-liquid mixing zone, and ensures that the liquid flows downward in sequence according to the fractionation stages, maintaining the material balance in the tower.

[0043] The one-way flow characteristics of the gas valve 7 and the liquid one-way valve 8 prevent gas from rushing upward into the liquid inlet pipe 2 and liquid from flowing back to the left, ensuring the one-way flow direction of gas and liquid and the stability of the process.

[0044] Based on any of the above technical solutions, a further optimization is made as follows: the top of each of the vertical scrapers 9 is fixed to the bottom of the upper ring 10, and the outer wall of the upper ring 10 is engaged and pressed against the inner wall of the upper cavity.

[0045] Each vertical scraper 9 is fixedly connected (e.g., by welding or bolting) to the bottom of the upper ring 10 to form an annular scraper assembly.

[0046] The outer wall of the upper ring 10 is in close contact with the inner wall of the upper cavity of the upper tower 1 (the fit gap is very small or the sealing is achieved through elastic deformation), so that the outer wall of the scraper always fits against the inner wall of the upper cavity when rotating.

[0047] When the lower tower 3 rotates, the upper ring 10 rotates synchronously through the coaxial gear disc 4 (because the upper ring 10 and the scraper are fixed as a whole), which in turn drives the vertical scraper 9 to make circumferential motion along the inner wall of the upper cavity, so as to realize the scraping operation of the area near the liquid inlet.

[0048] The upper ring 10 connects the independent vertical scrapers 9 into a ring-shaped integral structure, which significantly enhances the rigidity of the scraper assembly, prevents individual scrapers from shifting or shaking due to uneven force, and ensures the consistency and continuity of scraping action.

[0049] The outer wall of the upper ring 10 fits tightly against the inner wall of the upper cavity, maintaining a constant contact pressure between the outer wall of the scraper and the inner wall of the upper cavity. Even if the components wear slightly due to long-term operation, the scraping effect can still be maintained through the overall positioning of the upper ring 10, reducing the risk of scraping failure due to wear.

[0050] The tight fit between the upper ring 10 and the inner wall of the upper cavity forms a dynamic sealing ring, which can reduce the leakage of liquid in the upper cavity from the joint between the upper tower 1 and the lower tower 3.

[0051] Example 2: Compared with Example 1, this example also includes the following technical features:

[0052] Based on any of the above technical solutions, a further optimization is made by providing a recessed bend 11 at the bottom of the liquid inlet pipe 2.

[0053] The sinking bend 11 at the bottom of the inlet pipe 2 has a U-shaped structure. When liquid flows in from the top of the inlet pipe 2 and fills the bend, a liquid column (liquid seal) of a certain height is formed at the bottom of the bend.

[0054] When the high-pressure gas in the lower cavity of the lower tower 3 attempts to rise upward through the liquid inlet, it must overcome the gravity of the liquid column in the bend section and is thus blocked below the liquid inlet pipe 2, unable to enter the upper tower tray or liquid inlet pipe.

[0055] Due to gravity, the liquid can freely flow into the upper cavity of the upper column 1 through the bend, while the gas is effectively blocked because it cannot overcome the pressure of the liquid column, thus realizing the function of unidirectional liquid flow and reverse gas cut-off.

[0056] Based on any of the above technical solutions, a further optimization is made: the upper tower 1 is fixed-axis set and rotates on a fixed axis under the driving action of external equipment or by human rotation.

[0057] The upper tower 1 is fixed in axis by bearings or other positioning devices (the axis remains unchanged), and its bottom abuts against the top surface of the coaxial gear disk 4 of the lower tower 3 (smooth plane contact), allowing the upper tower 1 to rotate around the axis but restricting vertical movement.

[0058] When the upper tower 1 is rotated by external equipment (such as a motor via gear transmission) or manually, it makes a circular motion around a fixed axis, which drives the internal components connected to the upper tower 1 (such as a possible integrated stirring structure, guide plate, etc.) to rotate synchronously, changing the flow field distribution inside the tower.

[0059] Based on any of the above technical solutions, the following further optimization is made: the bottom surface of the upper tower 1, the top surface and the bottom surface of the coaxial gear disk 4 are all smooth planes formed by polishing and grinding.

[0060] The bottom surface of the upper tower 1, the top surface and the bottom surface of the coaxial toothed disk 4 are polished and ground (such as mechanical grinding and electrolytic polishing) to remove microscopic protrusions and form a smooth surface with extremely low roughness (surface roughness value Ra≤0.8μm).

[0061] The smooth contact surface reduces the frictional resistance between the upper tower 1 and the coaxial toothed disk 4, making their relative rotation (such as when the upper tower 1 or the lower tower 3 rotates) smoother, while reducing the risk of material retention.

[0062] Based on any of the above technical solutions, a further optimization is made by installing a wear-resistant sealing ring 12 on the upper outer side wall of the lower tower 3. The wear-resistant sealing ring 12 is used to achieve a tight sealing contact between the outer side wall of the lower tower 3 and the inner side wall of the upper tower 1.

[0063] The wear-resistant sealing ring 12 is an annular elastic component that fits into the annular groove on the upper outer side wall of the lower tower 3, and its outer side wall is in close contact with the inner side wall of the upper tower 1.

[0064] When the upper and lower towers rotate relative to each other (as shown by the circumferential rotation of the lower tower 3), the wear-resistant sealing ring 12 fills the tiny gap between them through its own elastic deformation, forming a dynamic sealing interface to prevent the liquid in the upper cavity from leaking from the joint between the upper tower 1 and the lower tower 3.

[0065] Based on any of the above technical solutions, a further optimization is made: the space on the left side of the overflow baffle 6 serves as a mixing area for low-temperature liquid and high-temperature gas.

[0066] The overflow baffle 6 divides the surface of the built-in tray 5 into left and right sides, with the left side space clearly defined as a mixing area for cryogenic liquid and high-temperature gas. After the cryogenic liquid flows into this area through the inlet, it is temporarily retained due to the obstruction of the overflow baffle 6, forming a liquid layer of a certain height;

[0067] The high-temperature gas in the lower chamber of the lower column 3 bubbles upward through the left one-way gas valve 7. When it passes through the liquid layer, it comes into direct contact with the low-temperature liquid and uses the temperature difference between the two to exchange heat. At the same time, the turbulence generated by the bursting of the bubbles enhances the gas-liquid mass transfer efficiency.

[0068] The specific process of this utility model is as follows:

[0069] I. Overall Structure and Initial Conditions:

[0070] Fixed and rotating components: The lower tower 3 is vertically fixed and can rotate circumferentially; the upper tower 1 is sleeved on the upper part of the lower tower 3 and supported by the coaxial gear plate 4 (top surface abuts). The contact surfaces of the two are polished, resulting in low frictional resistance.

[0071] Liquid inlet and gas-liquid mixing assembly: Liquid inlet pipe 2 is connected to the drain port of the upper tray, and liquid flows into the upper cavity of the upper column 1 through the liquid inlet; the lower cavity of the lower column 3 is equipped with an internal tray 5, with an overflow baffle 6 on the right side of its top, a one-way gas valve 7 installed on the left side, and a liquid one-way valve 8 installed on the right side.

[0072] Sealing and scraping structure: The outer wall of the lower column 3 is sealed and pressed against the inner wall of the upper column 1 by a wear-resistant sealing ring 12; the vertical scraper 9 at the top of the lower column 3 scrapes the inner wall of the upper column 1 as it rotates to prevent the liquid inlet from being blocked.

[0073] II. Step-by-step analysis of the work process:

[0074] Liquid input and initial distribution:

[0075] Liquid feeding stage: The liquid in the upper tray flows into the upper column 1 through the liquid inlet pipe 2 and falls onto the surface of the built-in tray 5 through the liquid inlet.

[0076] The optimized design serves to prevent high-pressure gas from backflowing into the lower tower 3 by forming a liquid seal at the bottom of the liquid inlet pipe 2, thus ensuring a stable inflow of liquid.

[0077] Regional retention: The liquid first enters the space to the left of the overflow baffle 6 and is temporarily retained due to the baffle, forming a liquid layer of a certain height (low temperature liquid area).

[0078] Key functions: The liquid layer on the left provides a place for gas-liquid mixing, and overflows to the right when the liquid level exceeds the top of the baffle.

[0079] Gas-liquid mixing and mass transfer processes:

[0080] Gas bubbling and mixing: The high-temperature and high-pressure gas in the lower chamber of the lower column 3 bubblees upward through the left one-way gas valve 7 and passes through the low-temperature liquid layer on the left side of the overflow baffle 6.

[0081] Mechanism of action:

[0082] The bubbles are in direct contact with the liquid, and heat exchange occurs through the temperature difference (the gas releases heat, and the liquid absorbs heat and vaporizes).

[0083] Bubble bursting generates turbulence, increases the gas-liquid contact area, and enhances mass transfer efficiency (such as the transfer of volatile components from the liquid phase to the gas phase).

[0084] Advantages of the mixing zone design: The left side of the overflow baffle 6 is clearly designated as the mixing zone for low-temperature liquid and high-temperature gas. The mixing intensity is controlled by the height of the baffle and the distribution of the one-way gas valves 7, avoiding insufficient contact caused by rapid liquid flow.

[0085] Liquid overflow and hierarchical transport:

[0086] Right-side overflow control: When the liquid level on the left side is higher than the top of the overflow baffle 6, the liquid overflows to the right and accumulates above the liquid check valve 8.

[0087] Flowing downwards: When the liquid pressure on the right side reaches the threshold, the liquid check valve 8 opens, and the liquid flows into the lower chamber of the lower column 3 and continues to flow into the lower fractionation tray, completing the tiered separation.

[0088] One-way valve function: Prevents liquid backflow into the left mixing zone, ensuring that the fractionation process proceeds continuously in one direction.

[0089] The synergistic effect of rotating components:

[0090] Lower tower cylinder 3 rotates:

[0091] Scraping function: The rotation of the lower tower 3 drives the vertical scraper 9 (fixed at the top by the upper ring 10) to move in a circular motion. The outer wall of the scraper presses against the inner wall of the upper tower 1 to remove the material accumulated near the liquid inlet and avoid blockage.

[0092] Mixing enhancement: When the lower column 3 rotates, the built-in column tray 5 rotates accordingly, stirring the gas and liquid phases in the left mixing zone, further enhancing the turbulence and mass transfer efficiency.

[0093] Upper tower 1 can rotate (optional):

[0094] The upper column 1 can be rotated by external drive or manual force to adjust the relative position of the liquid inlet and the built-in tray 5, or to change the flow field distribution through centrifugal force to dynamically optimize the fractionation effect (such as to adapt to the separation needs of different systems).

[0095] Sealing and energy consumption optimization:

[0096] The function of the wear-resistant sealing ring 12: The wear-resistant sealing ring 12, which is fitted onto the outer wall of the lower tower 3, ensures the relative rotation of the upper and lower towers while filling the gap through elastic clamping to prevent liquid leakage. It is especially suitable for high pressure or high volatility material scenarios.

[0097] Advantages of polished surfaces: The smooth surface of the bottom surface of the upper tower 1 and the coaxial toothed disk 4 reduces rotational friction resistance, lowers energy consumption, and at the same time avoids material retention, making cleaning and maintenance easier.

[0098] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0099] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A high-efficiency fractionation tray for ethyl chloroacetate distillation, characterized in that: The system includes a fixed upper column, with an inlet pipe installed on the lower left outer wall of the upper column. The top of the inlet pipe is connected to the drain port of the upper fractionation tray, and the end of the inlet pipe is horizontally to the right and sealed and fixed to the outer wall of the upper column. The interior of the inlet pipe is connected to the upper cavity of the upper column through an inlet. The lower outer wall of the upper column is sealed and movably fitted onto the upper outer wall of the lower column. A coaxial toothed disc is integrally formed and fixed on the upper outer wall of the lower column, with the top of the coaxial toothed disc abutting against the bottom of the upper column. The lower column is fixed vertically and rotates freely circumferentially. A gas-liquid mixing assembly is installed in the lower cavity of the lower column.

2. The high-efficiency fractionation tray for ethyl chloroacetate distillation according to claim 1, characterized in that: The gas-liquid mixing assembly includes an internal tray fixedly installed at the top opening of the lower column. The top of the internal tray is lower than the bottom of the liquid inlet. An overflow baffle is fixed to the right side of the top of the internal tray. The overflow baffle is used to block liquid entering to its left and to overflow to the right when it is also above its top. Several one-way gas valves are installed on the surface of the internal tray to the left of the overflow baffle. Each one-way gas valve is used to bubble high-pressure gas flowing upward in the lower cavity into the upper cavity. A liquid one-way valve is installed on the surface of the internal tray to the right of the overflow baffle. The liquid one-way valve is used to direct the liquid accumulated above it downward into the lower cavity and continue to flow into the fractionation tray of the lower layer.

3. The high-efficiency fractionation tray for ethyl chloroacetate distillation according to claim 2, characterized in that: Several vertical scrapers are fixed at even intervals along the circumference of the top of the lower column, and the outer side wall of the vertical scrapers abuts against the inner side wall of the upper cavity; each vertical scraper scrapes material from the liquid inlet as it rotates along the fixed axis of the lower column.

4. The high-efficiency fractionation tray for ethyl chloroacetate distillation according to claim 3, characterized in that: The top of each of the vertical scrapers is fixed to the bottom of the upper ring, and the outer wall of the upper ring is engaged and pressed against the inner wall of the upper cavity.

5. The high-efficiency fractionation tray for ethyl chloroacetate distillation according to claim 4, characterized in that: A recessed bend is provided at the bottom of the inlet pipe.

6. The high-efficiency fractionation tray for ethyl chloroacetate distillation according to claim 5, characterized in that: The upper tower is fixed in axis and rotates under the drive of external equipment or by human power.

7. The high-efficiency fractionation tray for ethyl chloroacetate distillation according to claim 6, characterized in that: The bottom surface of the upper tower, the top surface and the bottom surface of the coaxial gear disc are all smooth planes formed by polishing.

8. The high-efficiency fractionation tray for ethyl chloroacetate distillation according to claim 7, characterized in that: A wear-resistant sealing ring is installed on the upper outer side wall of the lower tower, and the wear-resistant sealing ring is used to achieve a tight sealing fit between the outer side wall of the lower tower and the inner side wall of the upper tower.

9. The high-efficiency fractionation tray for ethyl chloroacetate distillation according to claim 8, characterized in that: The space to the left of the overflow baffle serves as a mixing zone for low-temperature liquid and high-temperature gas.

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