Continuous preparation equipment and process for refined acenaphthene

Abstract

The invention relates to the technical field of crystallization equipment, and one embodiment of the invention provides refined acenaphthene continuous preparation equipment which comprises a bracket, the rotary drum is rotationally arranged on the bracket; one end of the first scraper swings relative to the support, and after the first scraper swings, the other end of the first scraper is close to or away from the rotary drum; one end of the second scraping plate is arranged on the first scraping plate, the other end of the second scraping plate is used for abutting against the rotary drum, and the first scraping plate and the second scraping plate are sequentially arranged in the rotating direction of the rotary drum. Another embodiment of the invention provides a continuous preparation process of refined acenaphthene. The continuous preparation process comprises the following steps: S1, rectification: carrying out rectification to obtain an acenaphthene fraction with the mass fraction of 80-90%; s2, crystallization: continuously crystallizing the acenaphthene fraction through a low-temperature drum; and S3, centrifuging, namely separating the scraped acenaphthene crystal layer in centrifugal equipment. According to the technical scheme, the technical problem that in the prior art, after the scraper and the rotary drum are in flexible contact, the efficiency of scraping the connecting piece by the scraper is affected is solved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of crystallization equipment, and more particularly, to an equipment and process for continuously preparing refined acenaphthene. Background Art

[0002] Acenaphthene, also known as 1,8 - Dihydroacenaphthalene, has a molecular formula of C 12 H 10 , and industrial acenaphthene is white or slightly yellowish needle - shaped crystals. Its melting point is 95 °C, boiling point is 277.5 °C, it is extremely slightly soluble in water, soluble in hot ether, hot benzene, toluene, glacial acetic acid, chloroform and petroleum ether, and slightly soluble in ethanol. Currently, the production methods for extracting industrial acenaphthene from wash oil at home and abroad mainly involve using a "double - furnace double - tower" or "triple - furnace triple - tower" to extract the naphthalene fraction from coal tar wash oil, and then loading the acenaphthene fraction with a concentration of 50% - 60% (mass fraction, the same below) into a crystallizer. After crystallization and filtration, solid industrial acenaphthene with a purity of 94.38% - 96.55% is obtained. High - purity acenaphthene products can be obtained by using the step - by - step temperature - rising emulsification crystallization method or vacuum distillation followed by solvent extraction. However, with the increasing demand for refined acenaphthene, the traditional production process has the following disadvantages: Although the use of distillation, extraction crystallization, and multiple solvent crystallizations can obtain refined acenaphthene with a relatively high purity of 99% acenaphthene content, due to the introduction of extraction agents, solvents, etc. in the process, the residual solvents will affect the safe use of the downstream products. There are certain safety risks during the oxidation reaction of acenaphthene, and the processes of extraction crystallization and solvent recrystallization, such as crystallization, centrifugal separation, and solvent recovery, have high energy consumption, and the solvents used are flammable and explosive. Using crystallization equipment such as a flaker can significantly reduce the preparation steps and improve the crystallization efficiency. However, after the existing flaker crystallizes, the processed wafers need to be scraped off from the drum. To improve the service life of the scraper, a flexible contact is usually adopted between the scraper and the drum, but the efficiency of the scraper for scraping the flakes is inevitably affected. Summary of the Invention

[0003] To overcome the above - mentioned defects, embodiments of the present disclosure provide an equipment and process for continuously preparing refined acenaphthene, which solves the technical problem that the scraping efficiency of the scraper is affected after the flexible contact between the scraper and the drum in the prior art.

[0004] According to one aspect, at least one embodiment of the present disclosure provides an equipment for continuously preparing refined acenaphthene, including: A bracket; A drum rotatably arranged on the bracket; A first scraper, one end of the first scraper is swingably arranged relative to the bracket, and after the first scraper swings, the other end of the first scraper approaches or moves away from the drum; A second scraper, one end of the second scraper is arranged on the first scraper, and the other end of the second scraper is used to abut against the drum, and the first scraper and the second scraper are arranged in sequence along the rotation direction of the drum.

[0005] For example, in a continuous acenaphthene preparation device provided by at least one embodiment of the present disclosure, it further includes: A spray pipe, the spray pipe is arranged on the bracket, and the spray pipe and the first scraper are respectively located on both sides of the drum; A material storage bin, the material storage bin is arranged on the bracket and is located below the drum.

[0006] For example, in a continuous acenaphthene preparation device provided by at least one embodiment of the present disclosure, it further includes: A mounting shaft, one end of the mounting shaft is arranged on the first scraper, and the other end is rotatably arranged on the side wall of the material storage bin; A first elastic member, the first elastic member is sleeved on the mounting shaft; An adjusting member, the adjusting member is slidably arranged on the mounting shaft, and both ends of the first elastic member respectively act on the adjusting member and the material storage bin.

[0007] For example, in a continuous acenaphthene preparation device provided by at least one embodiment of the present disclosure, one end of the second scraper is swingably arranged on the first scraper, and it further includes: A second elastic member, both ends of the second elastic member respectively act on the first scraper and the second scraper, and are used to provide a force for the first scraper and the second scraper to approach each other.

[0008] For example, in a continuous acenaphthene preparation device provided by at least one embodiment of the present disclosure, it further includes: A partition plate, the partition plate is arranged on the side of the material storage bin close to the first scraper, one end of the partition plate abuts against the drum, the partition plate divides the material storage bin into a liquid bin and a flake collection bin, and the first scraper and the second scraper are located in the flake collection bin.

[0009] The flake collection bin has an opening, the opening leads to a centrifugal device, and the upper surface of the partition plate is inclined downward near one side of the opening.

[0010] For example, in a continuous acenaphthene preparation device provided by at least one embodiment of the present disclosure, it further includes: A cooling cylinder, the cooling cylinder is arranged on the bracket, the cooling cylinder is located inside the drum, and the cooling cylinder has a receiving cavity; A liquid inlet member and a liquid outlet member, the liquid inlet member, the receiving cavity and the liquid outlet member are sequentially communicated; A support member, with both ends of the support member being respectively arranged on the liquid inlet member and the support bracket.

[0011] For example, in a continuous acenaphthene preparation device provided by at least one embodiment of the present disclosure, the rotary drum has a support shaft, and the liquid inlet member and the liquid outlet member have the same structure, both including: A liquid storage ring sleeved on the support shaft; Liquid distribution rods, there are multiple liquid distribution rods, and both ends of the multiple liquid distribution rods communicate with the accommodation cavity and the liquid storage ring; The support member has a support ring and support rods, the support ring is arranged on the multiple liquid distribution rods, and both ends of the support rods are respectively connected to the support ring and the support bracket.

[0012] For example, in a continuous acenaphthene preparation device provided by at least one embodiment of the present disclosure, the cooling cylinder has a notch, and the notch is located on the side close to the spray pipe.

[0013] According to another aspect, at least one embodiment of the present disclosure further provides a continuous acenaphthene preparation process, including the following steps: S1. Rectification: Obtain an acenaphthene fraction with a mass fraction of 80% - 90% through rectification; S2. Crystallization: Continuously crystallize the acenaphthene fraction through a low-temperature rotary drum; S3. Centrifugation: The scraped acenaphthene crystal layer enters a centrifugation device for separation.

[0014] The beneficial effects of the embodiments of the present disclosure are as follows: In the present disclosure, high-strength steel is selected for the support bracket. Through reasonable structural design and reinforcement treatment, it is ensured that various acting forces brought by the rotary drum, scraper, and materials can be withstood during the operation of the device, maintaining the stability of the device. The rotary drum is made of 304 stainless steel and undergoes fine polishing treatment, with a surface roughness reaching below Ra0.8. This not only facilitates the adhesion of materials but also reduces the wear on the surface of the rotary drum when the scraper scrapes. One end of the first scraper can be connected to the support bracket through a movable pin shaft, making the first scraper swing more flexibly. It can adjust the angle between the first scraping blade and the rotary drum according to different materials and the thickness of the crystallization. After adjustment, fix the angle of the first scraper. The contact end of the first scraper and the rotary drum can adopt a telescopic structure and an elastic pressing member can be added to the telescopic structure, so that the first scraper can always press against the rotary drum to scrape off the flakes. The second scraper can be made of rubber with relatively high material strength, which can not only ensure close fit with the rotary drum but also will not damage the surface of the rotary drum due to being too hard. After the first scraper scrapes off the flakes, the rotary drum continues to contact the second scraper. Through the supplementary scraping action of the second scraper, the flakes on the surface of the rotary drum are scraped off cleanly during rotation, improving the efficiency of continuous crystallization.

[0015] The rotational design of the rotary drum enables the continuous movement of materials on its surface, realizing the continuous production of acenaphthene and greatly improving production efficiency. The swingable characteristic of the first scraper can flexibly adjust the contact pressing force and angle with the rotary drum according to different material characteristics and production process requirements. For example, when dealing with materials with high viscosity, the distance between the first scraper and the rotary drum can be appropriately increased to avoid excessive stress on the scraper; while for materials with good crystallization effect and easy to scrape off, the distance can be reduced to improve the scraping efficiency. The second scraper and the first scraper are arranged in sequence along the rotational direction of the rotary drum. The first scraper first performs a preliminary scraping of the materials, separating most of the materials from the surface of the rotary drum, and then the second scraper performs a fine scraping, effectively solving the problem that the rigid contact between the scraper and the rotary drum is easy to damage. At the same time, through the optimization of the material and connection structure of the second scraper, the scraping effect is improved on the premise of ensuring flexible contact. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments of the present disclosure. Obviously, the drawings described below are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present disclosure and these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the continuous acenaphthene preparation equipment in an embodiment of the present disclosure; Figure 2 It is Figure 1 a schematic cross-sectional view of the overall structure in the embodiment of Figure 3 It is for the present disclosure Figure 1 a schematic enlarged view of the structure at A of Figure 4 It is for the present disclosure Figure 2 a schematic enlarged view of the structure at B of Figure 5 It is a schematic diagram of the structures of the first scraper and the second scraper of the present disclosure; Figure 6 It is a schematic diagram of a partial structure of the present disclosure; Figure 7 It is a schematic diagram of the cooling cylinder and its internal structure of the present disclosure.

[0018] In the figure: 10, support; 20, rotating drum; 21, first scraper; 22, second scraper; 11, spray pipe; 12, material storage bin; 23, mounting shaft; 24, first elastic member; 25, adjusting member; 26, second elastic member; 13, partition plate; 121, liquid bin; 122, flake collection bin; 1221, opening; 30, cooling cylinder; 301, accommodating cavity; 31, liquid inlet member; 32, liquid outlet member; 27, support member; 201, support shaft; 311, liquid storage ring; 312, liquid distribution rod; 271, support ring; 272, support rod; 302, notch. Detailed implementation manners The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than limiting the present disclosure.

[0019] For the sake of simplicity of the drawings, only the parts related to the disclosure are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, in some drawings, parts with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0020] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0021] In the present disclosure, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is at a lower horizontal height than the second feature.

[0022] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present disclosure.

[0023] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

[0024] As Figures 1 to 5 shown, it shows a continuous preparation device for acenaphthene in an embodiment of the present disclosure, including a bracket 10; a drum 20 is rotatably arranged on the bracket 10; one end of a first scraper 21 is swingably arranged relative to the bracket 10, and after the first scraper 21 swings, the other end of the first scraper 21 approaches or moves away from the drum 20; one end of a second scraper 22 is arranged on the first scraper 21, and the other end of the second scraper 22 is used to abut against the drum 20, and the first scraper 21 and the second scraper 22 are arranged in sequence along the rotation direction of the drum 20.

[0025] In some examples, the bracket 10 is made of high-strength steel. Through reasonable structural design and reinforcement treatment, it is ensured that various acting forces brought by the drum 20, the scraper and the material can be withstood during the operation of the equipment, maintaining the stability of the equipment. The drum 20 is made of 304 stainless steel and undergoes fine polishing treatment, and the surface roughness reaches below Ra0.8, which not only facilitates the adhesion of the material, but also reduces the wear on the surface of the drum 20 when the scraper scrapes. One end of the first scraper 21 can be connected to the bracket 10 through a movable pin shaft, making the swing of the first scraper 21 more flexible, and the angle between the first scraping blade and the drum 20 can be adjusted according to different materials and the thickness of the crystal. After the adjustment is completed, the angle of the first scraper 21 can be fixed. The contact end of the first scraper 21 and the drum 20 can adopt a telescopic structure and an elastic tightening member is added to the telescopic structure, so that the first scraper 21 can always press against the drum 20 to scrape off the flakes. The second scraper 22 can be made of rubber with relatively high material strength, which can not only ensure close fit with the drum 20, but also will not damage the surface of the drum 20 due to being too hard. After the first scraper 21 scrapes off the flakes, the drum 20 continues to contact the second scraper 22, and through the supplementary scraping action of the second scraper 22, the flakes on the surface of the drum 20 are scraped off cleanly during the rotation process, improving the efficiency of continuous crystallization.

[0026] The rotational design of the rotary drum 20 enables the continuous movement of materials on its surface, realizing the continuous production of fine acenaphthene and greatly improving production efficiency. The swingable characteristic of the first scraper 21 can flexibly adjust the contact pressing force and angle with the rotary drum 20 according to different material characteristics and production process requirements. For example, when processing materials with high viscosity, the distance between the first scraper 21 and the rotary drum 20 can be appropriately increased to avoid excessive stress on the scraper; while for materials with good crystallization effect and easy to scrape, the distance can be reduced to improve the scraping efficiency. The second scraper 22 and the first scraper 21 are arranged in sequence along the rotation direction of the rotary drum 20. The first scraper 21 first performs a preliminary scraping of the materials, separating most of the materials from the surface of the rotary drum 20, and then the second scraper 22 performs a fine scraping, effectively solving the problem that the rigid contact between the scraper and the rotary drum 20 is easy to damage. At the same time, through the optimization of the material and connection structure of the second scraper 22, the scraping effect is improved on the premise of ensuring flexible contact.

[0027] As Figure 2 shown, it shows the spray pipe 11 and the material storage bin 12 in another embodiment of the present disclosure. The spray pipe 11 is arranged on the support 10, and the spray pipe 11 and the first scraper 21 are respectively located on both sides of the rotary drum 20; the material storage bin 12 is arranged on the support 10 and is located below the rotary drum 20.

[0028] In some examples, the spray pipe 11 is evenly distributed with nozzles, and the angle of the nozzles and the distance from the rotary drum 20 are adjustable to ensure that the materials to be crystallized can be evenly sprayed on the surface of the rotary drum 20. The spray pipe 11 is installed on one side of the support 10 through a customized stainless steel support 10. The interior of the material storage bin 12 is subjected to anti-corrosion treatment and is located directly below the rotary drum 20, and can completely receive the materials flowing down from the rotary drum 20. The materials that have not been crystallized in time and impurities fall into the material storage bin 12 for temporary storage. The bottom of the rotary drum 20 is located in the material storage bin 12, and the shape of the material storage bin 12 wraps the lower edge of the rotary drum 20, and the materials that have not been crystallized in time can still contact the rotary drum 20 for crystallization. When there is more liquid in the material storage bin 12, the spray pipe 11 can stop feeding. During the continuous rotation of the rotary drum 20, the residual materials to be crystallized in the material storage bin 12 can continue to crystallize until no flakes are produced in the rotary drum 20, and then the solution in the material storage bin 12 is discharged. Although the spray pipe 11 can continue the continuous crystallization work after working again. The material storage bin 12 can timely collect the materials flowing down from the rotary drum 20, avoid the scattering of materials, ensure the cleanliness of the production environment, and at the same time facilitate the subsequent centralized treatment of the materials, making the entire production process more coherent and efficient.

[0029] As Figure 1 、 Figure 3As shown, it shows an acenaphthene continuous preparation device in another embodiment of the present disclosure, further including a mounting shaft 23. One end of the mounting shaft 23 is arranged on the first scraper 21, and the other end is rotatably arranged on the side wall of the material storage bin 12; the first elastic member 24 is sleeved on the mounting shaft 23; the adjusting member 25 is slidably arranged on the mounting shaft 23, and both ends of the first elastic member 24 act on the adjusting member 25 and the material storage bin 12 respectively.

[0030] One end of the mounting shaft 23 can be firmly connected to the first scraper 21 by means of threaded connection or bolt connection, and the other end is rotatably arranged on the side wall of the material storage bin 12. By rotating the adjusting member 25, the compression amount of the compression spring can be precisely adjusted, thereby changing the pressure of the first scraper 21 on the drum 20. The elastic force provided by the first elastic member 24 can enable the first scraper 21 to always maintain an appropriate pressure on the drum 20. When the scraper contacts the drum 20, the elastic deformation of the spring can buffer the impact force received by the scraper, avoiding damage caused by rigid contact. At the same time, according to different material characteristics and production process requirements, the operator can conveniently adjust the elastic force of the first elastic member 24 through the adjusting member 25. For example, for a harder material crystal layer, the elastic force of the spring can be appropriately increased to ensure the scraping effect; for a softer material, the elastic force is reduced to prevent the scraper from over-scratching the surface of the drum 20. This adjustable structure enhances the adaptability of the device to different production situations and effectively solves the technical problems when the scraper contacts the drum 20.

[0031] As Figure 2 , Figure 4 shown, one end of the second scraper 22 is swingably arranged on the first scraper 21, and further includes a second elastic member 26. Both ends of the second elastic member 26 act on the first scraper 21 and the second scraper 22 respectively, and are used to provide a force for the first scraper 21 and the second scraper 22 to approach each other.

[0032] One end of the second scraper 22 is connected to the first scraper 21 through a high-strength hinge. The pin shaft of the hinge is made of stainless steel, and an antifriction bushing is installed between the pin shaft and the hinge hole, enabling the second scraper 22 to swing flexibly. The second elastic member 26 is a torsion spring, and its two ends act on the first scraper 21 and the second scraper 22 respectively, causing the first scraper 21 and the second scraper 22 to move away from each other. Thus, when the first scraper 21 contacts the drum 20, the second scraper 22 also remains in contact with the drum 20 all the time. During the process of the scraper scraping the material, even if there is a certain degree of unevenness on the surface of the drum 20, the elastic action of the second elastic member 26 can make the second scraper 22 always maintain good contact with the drum 20, ensuring that the material can be completely scraped off. At the same time, since the second scraper 22 and the first scraper 21 are connected by a hinge and an elastic member, which belongs to a flexible connection, it effectively avoids the damage risk caused by rigid contact. This structural design improves the service life of the scraper while ensuring the scraping effect, and solves the problem of poor scraping effect after flexible contact.

[0033] As Figure 2 shown, it further includes a partition plate 13. The partition plate 13 is arranged on one side of the material storage bin 12 close to the first scraper 21. One end of the partition plate 13 abuts against the drum 20. The partition plate 13 divides the material storage bin 12 into a liquid bin 121 and a flake collection bin 122. The first scraper 21 and the second scraper 22 are located in the flake collection bin 122.

[0034] The partition plate 13 is connected to one side of the material storage bin 12 close to the first scraper 21. One end of the partition plate 13 close to the drum 20 is in close contact with the surface of the drum 20, and the contact part can still scrape off the flakes that have not been scraped clean. The partition plate 13 divides the material storage bin 12 into a liquid bin 121 and a flake collection bin 122, enabling the liquid and flake materials to be collected separately. During the preparation process of acenaphthene, through the action of the partition plate 13, the liquid sprayed by the spray pipe 11 can flow into the liquid bin 121, facilitating subsequent recovery and treatment; the flake materials enter the flake collection bin 122, which is convenient for the next centrifugal separation and other operations. This method of classified collection improves the refinement degree of production, is beneficial to improving product quality and production efficiency, and at the same time reduces the mutual interference between different materials, further optimizing the production process.

[0035] As Figure 6 shown, the flake collection bin 122 has an opening 1221 leading to a centrifugal device, and the upper surface of the partition plate 13 is inclined downward near one side of the opening 1221.

[0036] The opening 1221 of the flake collection bin 122 is connected to the centrifugal equipment, ensuring that the material can smoothly enter the centrifugal equipment. The upper surface of the partition plate 13 near one side of the opening 1221 is machined into a downward-inclined slope, generally controlled between 5° and 10°. This can not only ensure that the flake material can smoothly slide towards the opening 1221, but also prevent the material from sliding too fast due to too large a slope, which may affect the subsequent centrifugal separation effect. The inclined upper surface of the partition plate 13 facilitates the sliding of the flake material towards the opening 1221, realizing the automatic conveying of the material and improving the degree of automation of production. The flake material automatically slides into the centrifugal equipment along the slope under the action of gravity, reducing manual intervention, lowering the labor intensity, and also avoiding the material pollution and loss that may be caused by manual operation. This design makes the entire production process smoother and more efficient, further improving the production efficiency and product quality.

[0037] As Figures 6 to 7 shown, it also includes a cooling cylinder 30, a liquid inlet part 31 and a liquid outlet part 32. The cooling cylinder 30 is arranged on the support 10, the cooling cylinder 30 is located inside the drum 20, and the cooling cylinder 30 has a receiving cavity 301; the liquid inlet part 31, the receiving cavity 301 and the liquid outlet part 32 are communicated in sequence; both ends of the support member 27 are respectively arranged on the liquid inlet part 31 and the support 10.

[0038] The cooling cylinder 30 adopts a double-layer structure, and a receiving cavity 301 is formed between the inner layer and the outer layer, which is filled with an efficient coolant. The liquid inlet part 31 and the liquid outlet part 32 are connected to an external cooling system through pipelines, and a flow regulating valve and a temperature sensor are installed on the pipelines, which can accurately control the flow rate and temperature of the coolant. The cooling cylinder 30 cools the drum 20, reducing the temperature of the drum 20, which can effectively promote the crystallization of acenaphthene. The coolant circulates in the cooling cylinder 30, taking away the heat of the material and quickly cooling the material to crystallize. The liquid inlet part 31 and the liquid outlet part 32 ensure the stable circulation of the coolant. Through the control of the flow regulating valve and the temperature sensor, the flow rate and temperature of the coolant can be accurately adjusted to meet the requirements of different production processes. The support member 27 stably supports the liquid inlet part 31 and the cooling cylinder 30, ensuring that the equipment will not shake or displace during operation, and guaranteeing the normal operation of the equipment. At the same time, the improvement of the cooling effect helps to improve the crystallization quality of acenaphthene and further improve the product quality.

[0039] As Figure 6 shown, the drum 20 has a support shaft 201. The liquid inlet part 31 and the liquid outlet part 32 have the same structure, both including a liquid storage ring 311 and a liquid distribution rod 312. The liquid storage ring 311 is sleeved on the support shaft 201; there are multiple liquid distribution rods 312, and both ends of the multiple liquid distribution rods 312 are communicated with the receiving cavity 301 and the liquid storage ring 311; the support member 27 has a support ring 271 and a support rod 272. The support ring 271 is arranged on the multiple liquid distribution rods 312, and both ends of the support rod 272 are respectively connected to the support ring 271 and the support 10.

[0040] The liquid storage ring 311 adopts an annular structure, and its inner diameter and outer diameter are precisely designed according to the size of the cooling cylinder 30 and the flow rate requirements of the coolant. The liquid storage ring 311 is sleeved on the support shaft 201 of the rotating drum 20. The liquid distribution rod 312 is made of a stainless steel pipe, and its quantity and distribution are reasonably designed according to the size of the cooling cylinder 30 and the cooling requirements, and are generally evenly distributed around the liquid storage ring 311. Both ends of the liquid distribution rod 312 are respectively communicated with the accommodating cavity 301 and the liquid storage ring 311 to ensure the smooth flow of the coolant. The support ring 271 and the support rod 272 are connected by welding. The support ring 271 is tightly sleeved on the liquid distribution rod 312, and the support rod 272 connects the support ring 271 and the bracket 10 together to provide a supporting effect for the cooling cylinder 30. The structures of the liquid storage ring 311 and the liquid distribution rod 312 can make the coolant evenly distributed in the cooling cylinder 30, improving the uniformity of the cooling effect. After the coolant flows through the cooling cylinder 30, it flows out through the liquid outlet part 32. After being stored in the liquid storage ring 311, the coolant evenly flows into the accommodating cavity 301 of the cooling cylinder 30 through a plurality of liquid distribution rods 312, ensuring the uniform distribution of the temperature on the surface of the rotating drum 20, thereby improving the crystallization quality of acenaphthene. The reasonable structural design of the support member 27 can stably support the relevant components, ensuring the reliability of the equipment during operation. The connection method and material selection of the support ring 271 and the support rod 272 not only ensure the firmness of the connection, but also improve the rust and corrosion resistance of the support member 27, extending the service life of the equipment.

[0041] As Figure 2 shown, the cooling cylinder 30 has a notch 302, and the notch 302 is located on the side close to the spray pipe 11.

[0042] The notch 302 is machined on the cooling cylinder 30 on the side close to the spray pipe 11. The size of the notch 302 is arranged according to the position of the spray pipe 11, the spraying range of the nozzle, and the size of the cooling cylinder 30. Generally, the length of the notch 302 accounts for 1 / 6 - 1 / 5 of the circumference of the cooling cylinder 30. The edge of the notch 302 is polished to avoid sharp corners, preventing damage to the spray pipe 11 and other components. The setting of the notch 302 can make the liquid sprayed by the spray pipe 11 better contact the surface of the rotating drum 20, avoiding too low temperature on the surface of the rotating drum 20 and making it inconvenient for the material to adhere and crystallize.

[0043] The present disclosure relates to a continuous preparation process for acenaphthene, including the following steps: S1. Rectification: Obtaining an acenaphthene fraction with a mass fraction of 80% - 90% through rectification; S2. Crystallization: Continuously crystallizing the acenaphthene fraction through a low-temperature rotating drum 20; S3. Centrifugation: Scraping the acenaphthene crystal layer into a centrifugation device for separation.

[0044] In this embodiment, in the rectification step, a high-efficiency rectification column is selected, and parameters such as the number of trays and reflux ratio of the rectification column are adjusted according to the composition and quality requirements of the acenaphthene fraction to obtain an acenaphthene fraction with a mass fraction of 85%. In the crystallization step, the rotation speed of the rotary drum 20 is generally controlled between 5 r / min and 10 r / min. In the centrifugation step, according to the characteristics of the crystallized material and the production scale, a suitable type of centrifugation equipment is selected, such as a horizontal screw discharge centrifuge or a belt vacuum filtration equipment, and the rotation speed and separation factor of the centrifuge are adjusted according to the actual situation. This preparation process obtains a high-purity acenaphthene fraction through rectification, providing high-quality raw materials for subsequent crystallization and centrifugal separation. In the crystallization step, by precisely controlling the rotation speed of the rotary drum 20 and the cooling temperature, the quality and efficiency of acenaphthene crystallization are ensured. The reasonable rotation speed of the rotary drum 20 enables the material to be evenly distributed on the surface of the rotary drum 20, and the precise control of the cooling temperature promotes the crystallization of acenaphthene, improving the integrity and purity of the crystallization. In the centrifugation step, selecting a suitable type of centrifugation equipment can effectively separate the acenaphthene crystals and impurities in the crystallized material, improving the purity of the product. The purity of acenaphthene crystallization can be further increased by adding rinsing during the centrifugal separation process. The entire preparation process realizes the continuous production of acenaphthene, improves production efficiency and product quality, and reduces production costs. At the same time, through the precise control of each step, the stable operation of the equipment and the smooth progress of production are ensured.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit them. Although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and they should all be covered within the scope of the claims of the present disclosure.

Claims

1. A continuous preparation device for purified acenaphthene, characterized in that: include: Bracket (10); a rotating drum (20), the rotating drum (20) being rotatably disposed on the bracket (10); A first scraper (21), one end of the first scraper (21) being swingably arranged relative to the bracket (10), and after the first scraper (21) swings, the other end of the first scraper (21) approaches or moves away from the rotating drum (20); A second scraper (22), one end of the second scraper (22) is arranged on the first scraper (21), the other end of the second scraper (22) is used to abut against the rotating drum (20), and the first scraper (21) and the second scraper (22) are arranged in sequence along the rotation direction of the rotating drum (20).

2. The continuous preparation equipment for purified acenaphthene according to claim 1, characterized in that: Also includes: a spray pipe (11), the spray pipe (11) being arranged on the bracket (10), the spray pipe (11) and the first scraper (21) being respectively located on two sides of the rotating drum (20); A material storage bin (12), wherein the material storage bin (12) is arranged on the support (10) and is located below the rotating drum (20).

3. The continuous preparation equipment for purified acenaphthene according to claim 2, characterized in that: Also includes: a mounting shaft (23), one end of the mounting shaft (23) being arranged on the first scraper (21), and the other end of the mounting shaft (23) being rotatably arranged on the side wall of the material storage bin (12); a first elastic member (24), wherein the first elastic member (24) is sleeved on the mounting shaft (23); An adjusting member (25) is slidably disposed on the mounting shaft (23), and two ends of the first elastic member (24) act on the adjusting member (25) and the material storage bin (12) respectively.

4. The continuous preparation equipment for purified acenaphthene according to any one of claims 1 to 3, characterized in that: One end of the second scraper (22) is swingably disposed on the first scraper (21), and further comprises: A second elastic member (26), two ends of the second elastic member (26) acting on the first scraper (21) and the second scraper (22) respectively, for providing a force for bringing the first scraper (21) and the second scraper (22) closer to each other.

5. The continuous preparation equipment for purified acenaphthene according to claim 2, characterized in that: Also includes: A partition plate (13), the partition plate (13) being arranged on a side of the material storage bin (12) close to the first scraper (21), one end of the partition plate (13) being in contact with the rotating drum (20), the partition plate (13) dividing the material storage bin (12) into a liquid bin (121) and a flake collection bin (122), the first scraper (21) and the second scraper (22) being located in the flake collection bin (122).

6. The continuous preparation equipment for purified acenaphthene according to claim 5, characterized in that: The flake collection bin (122) has an opening (1221), the opening (1221) leads to the centrifugal device, and the upper surface of the partition plate (13) is inclined downwards near the opening (1221).

7. The continuous preparation equipment for purified acenaphthene according to claim 2, characterized in that: Also includes: A cooling cylinder (30), the cooling cylinder (30) being arranged on the bracket (10), the cooling cylinder (30) being located in the rotating drum (20), and the cooling cylinder (30) having a containing cavity (301); A liquid inlet member (31) and a liquid outlet member (32), wherein the liquid inlet member (31), the accommodating chamber (301) and the liquid outlet member (32) are sequentially connected; A support member (27), wherein two ends of the support member (27) are respectively arranged on the liquid inlet member (31) and the bracket (10).

8. The continuous preparation equipment for purified acenaphthene according to claim 7, characterized in that: The rotating drum (20) has a supporting shaft (201), and the liquid inlet component (31) and the liquid outlet component (32) have the same structure, and both include: A liquid storage ring (311), wherein the liquid storage ring (311) is sleeved on the support shaft (201); A liquid-dispensing rod (312), wherein the liquid-dispensing rod (312) is provided in plurality, and both ends of the plurality of liquid-dispensing rods (312) are connected to the accommodating cavity (301) and the liquid storage ring (311); The support member (27) comprises a support ring (271) and a support rod (272); the support ring (271) is arranged on a plurality of the liquid dispensing rods (312); and two ends of the support rod (272) are respectively connected to the support ring (271) and the bracket (10).

9. The continuous preparation equipment for purified acenaphthene according to claim 7, characterized in that: The cooling cylinder (30) has a notch (302), and the notch (302) is located on a side close to the spray pipe (11).

10. A continuous preparation process of purified acenaphthene, characterized in that: The steps include: S1. Distillation: Obtain an acenaphthene fraction with a mass fraction of 80% to 90% by distillation; S2, crystallization: the acenaphthene fraction is continuously crystallized by a low temperature rotary drum (20); S3, centrifugation: the scraped acenaphthene crystal layer enters the centrifugal device for separation.

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