Novel wiped film cracker

Abstract

The utility model discloses a novel wiped film cracker, which belongs to the technical field of oligomer processing and comprises a main machine body and a variable frequency motor fixed at the top end of the main machine body, the variable frequency motor is in transmission connection with a mechanical seal through a coupler, and the mechanical seal is movably connected to the top of the outer side of the main machine body. A stirring paddle with a scraping plate is arranged in the main machine body, a feed liquid distributor is fixedly arranged at the middle upper part of the inner side of the main machine body, the top end of the stirring paddle with the scraping plate is in interference fit connection with the top end of the mechanical seal, and a wear-resistant bearing is arranged at the bottom end of the stirring paddle with the scraping plate. The wiped film cracker with the structure can realize uniform dispersion of feed liquid, adjust the distance between the scraper and the inner wall of equipment, control the film forming thickness of the feed liquid, effectively prevent coking and carbon deposition of the feed liquid, avoid frequent disassembly and assembly of the equipment, ensure continuous operation of a process system, and realize full-automatic and continuous production of cracking cyclization reaction.

Description

Technical Field

[0001] The utility model relates to the technical field of oligomer processing, and more specifically to a novel scraping film cracker. Background Art

[0002] Oligomers are also called oligomers. They refer to polymers composed of fewer repeating units. Their relative molecular mass is between small molecules and macromolecules. Different researchers have different definitions of the scope of oligomers, which generally refer to polymers composed of 10 to 20 repeating units. During the production and processing of oligomers, cracking or evaporation is required.

[0003] At present, the crackers or evaporators used in most factories or laboratories have relatively simple structures, and the liquid distribution effect of the distributor is not good, resulting in the inability of the liquid to evenly cover the inner wall of the cracker or evaporator, which in turn causes low equipment utilization and low product yield; in addition, the film thickness of the liquid cannot be guaranteed, especially when the liquid flows to the lower half of the equipment, the amount of liquid gradually decreases, resulting in insufficient liquid, which is very easy to carbonize and coke on the inner wall of the equipment at high temperature, affecting the use of the equipment and heat transfer.

[0004] Therefore, in view of this, the existing structure is studied and improved, and a new type of scraping film cracker is provided, in order to achieve a more practical purpose. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a new type of scraped film cracker. The scraped film cracker with this structure can achieve uniform dispersion of the feed liquid, and can adjust the distance between the scraper and the inner wall of the equipment to control the thickness of the film formed by the feed liquid, effectively prevent the coking and carbon deposition of the feed liquid, avoid frequent disassembly and assembly of the equipment, ensure the continuous operation of the process system, and realize the fully automatic and continuous production of the cracking cyclization reaction.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A novel scraping film cracker comprises a main body and a variable frequency motor fixed at the top of the main body, a coupling is arranged at the output end of the variable frequency motor, and a mechanical seal is connected to the main body through the coupling transmission, the mechanical seal is movably connected to the outer top of the main body, a stirring paddle with a scraper is arranged inside the main body, a liquid distributor is fixedly arranged at the middle and upper part of the inner side of the main body, the top of the stirring paddle with the scraper passes through the liquid distributor and is connected to the top of the mechanical seal through interference fit, a wear-resistant bearing is arranged at the bottom of the stirring paddle with the scraper, and is movably connected to the inner bottom of the main body through the wear-resistant bearing;

[0010] A fixed scraper is installed at the radial end of the middle part of the stirring paddle with a scraper, a movable scraper is installed at the radial end of the bottom of the stirring paddle with a scraper, and an upper heating jacket, a baffle and a lower heating jacket are arranged on the side of the main body;

[0011] The main body comprises a vacuum chamber and a lower cylinder.

[0012] Furthermore, the vacuum chamber and the lower cylinder are integrally formed, and the inner diameter of the vacuum chamber is larger than the inner diameter of the lower cylinder.

[0013] Furthermore, a vacuum light phase discharge port is fixedly arranged on the side of the vacuum chamber.

[0014] Furthermore, the liquid-feed distributor is fixed at the connection channel between the vacuum chamber and the lower cylinder, and a right feed port is fixedly provided at one end of the liquid-feed distributor, and a left feed port is fixedly provided at the other end of the liquid-feed distributor.

[0015] Furthermore, the upper heating jacket is fixed to the upper side of the lower cylinder, and an upper jacket heating medium outlet is provided at the upper side of the upper heating jacket, and an upper jacket heating medium inlet is provided at the lower side of the upper heating jacket.

[0016] Furthermore, the baffles are provided in a plurality and are evenly distributed on the upper side and the lower side of the lower cylinder, and the fixed scrapers are distributed on the upper inner side of the lower cylinder.

[0017] Furthermore, the lower heating jacket is arranged at the bottom of the side of the lower cylinder, and a lower jacket heating medium outlet is arranged at the upper part of the side of the lower heating jacket, and a lower jacket heating medium inlet is arranged at the lower part of the side of the lower heating jacket.

[0018] Furthermore, the movable scraper is distributed on the lower part of the inner side surface of the lower cylinder.

[0019] Furthermore, a bottom heating jacket is provided on the bottom side of the lower cylinder, a bottom heating jacket heating medium inlet is provided on the outer bottom of the bottom heating jacket, and a bottom heating jacket heating medium outlet is provided on the outer top of the bottom heating jacket;

[0020] A heavy phase discharge port is arranged just below the bottom of the lower cylinder.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] ① In this scheme, the scraper cracker is driven by a variable frequency motor, which can realize the speed adjustment of the scraper cracker, and the movable scraper and the fixed scraper cooperate with each other to realize the self-adaptation of the scraper spacing, and at the same time improve the interface renewal rate, so that the feed liquid in the distributor is evenly covered on the inner wall of the cracker or evaporator, thereby improving the utilization rate of the equipment and the yield of the final product, and at the same time ensuring that the thickness of the feed liquid during film formation is at a reasonable value required by the process, realizing the uniform distribution of the scraper cracker, the adjustable spacing, the avoidance of carbonization and coking of the feed liquid, and the self-cleaning of the equipment;

[0024] ② In this scheme, when the scraped film cracker is in use, the pipe flanges of each inlet and outlet can be of corresponding specifications and models according to the temperature control system and the vacuum system. At the same time, the stirring paddle with scraper, the fixed scraper and the movable scraper can also be replaced, and the vacuum system can adjust the vacuum degree, and the temperature control system can adjust the heating temperature. At the same time, the upper jacket heating, the lower jacket heating and the bottom jacket heating form three groups of heating circulation structures, which realize segmented autonomous temperature control, avoid the problem of insufficient heating of the feed liquid, and thus avoid the disadvantages of carbonization and coking at high temperature, ensuring the normal use of the equipment and the excellent transfer of heat in the equipment;

[0025] ③ In this scheme, the scraping film cracker does not need to be frequently disassembled and assembled during use. At the same time, it can achieve 7×24 hours of continuous and uninterrupted operation, which greatly guarantees the working efficiency of the scraping film cracker and realizes the fully automatic and continuous production of the cracking cyclization reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the scraping film cracker in the utility model;

[0027] Figure 2 For the utility model Figure 1 The structural diagram of the enlarged part A in the middle;

[0028] Figure 3 It is a schematic diagram of the structure of the scraping film cracker in the utility model when it is working.

[0029] Description of the numbers in the figure:

[0030] 1. Frequency conversion motor; 2. Coupling; 3. Mechanical seal; 4. Vacuum light phase discharge port; 5. Liquid distributor; 6. Right feed port; 7. Upper heating jacket; 8. Baffle; 9. Fixed scraper; 10. Upper jacket heating medium inlet; 11. Stirring paddle with scraper; 12. Movable scraper; 13. Lower jacket heating medium inlet; 14. Wear-resistant bearing; 15. Bottom heating jacket; 16. Bottom jacket heating medium inlet; 17. Heavy phase discharge port; 18. Bottom jacket heating medium outlet; 19. Lower heating jacket; 20. Lower jacket heating medium outlet; 21. Upper jacket heating medium outlet; 22. Left feed port; 23. Main body; 24. Vacuum chamber; 25. Lower cylinder. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0032] Embodiment 1:

[0033] See also Figure 1-3 A novel scraping film cracker comprises a main body 23 and a variable frequency motor 1 fixed at the top of the main body 23, a coupling 2 is arranged at the output end of the variable frequency motor 1, and a mechanical seal 3 is connected to the output end of the variable frequency motor 1 through the coupling 2, the mechanical seal 3 is movably connected to the outer top of the main body 23, a stirring paddle 11 with a scraper is arranged inside the main body 23, a liquid distributor 5 is fixedly arranged at the middle and upper part of the inner side of the main body 23, the top of the stirring paddle 11 with a scraper passes through the liquid distributor 5 and is connected to the mechanical seal 3 by interference fit, a wear-resistant bearing 14 is arranged at the bottom end of the stirring paddle 11 with a scraper, and is movably connected to the inner bottom of the main body 23 through the wear-resistant bearing 14; the rotation speed of the entire stirring paddle 11 with a scraper is driven by the variable frequency motor 1, and because the rotation speed of the variable frequency motor 1 is adjustable, it cooperates with the subsequent active scraper 12 and the fixed scraper 9 to adapt the scraping film spacing and improve the interface update rate.

[0034] A fixed scraper 9 is installed at the radial end in the middle of the agitator paddle 11 with a scraper, a movable scraper 12 is installed at the radial end at the bottom of the agitator paddle 11 with a scraper, and an upper heating jacket 7, a baffle 8 and a lower heating jacket 19 are arranged on the side of the main body 23; the upper heating jacket 7 and the lower heating jacket 19 can complete the heating of the upper and lower parts of the main body 23, thereby realizing temperature control inside the scraped film cracker.

[0035] The main body 23 includes a vacuum chamber 24 and a lower cylinder 25 .

[0036] See also Figure 1 and Figure 2 Specifically, the vacuum chamber 24 and the lower cylinder 25 are integrally formed, and the inner diameter of the vacuum chamber 24 is larger than the inner diameter of the lower cylinder 25. The vacuum chamber 24 is a funnel-shaped structure, which can facilitate the collection and temporary storage of the light phase.

[0037] See also Figure 1 and Figure 2 Specifically, a vacuum light phase discharge port 4 is fixedly provided on the side of the vacuum chamber 24 for obtaining gas phase materials in the feed liquid.

[0038] See also Figure 1 and Figure 2 Specifically, the liquid distributor 5 is fixed at the connection channel between the vacuum chamber 24 and the lower cylinder 25, and a right feed port 6 is fixedly provided at one end of the liquid distributor 5, and a left feed port 22 is fixedly provided at the other end of the liquid distributor 5. The right feed port 6 and the left feed port 22 can be fed separately, so as to improve the feeding efficiency and ensure the uniform distribution of the liquid inside the main body 23 after feeding.

[0039] See also Figure 1 and Figure 2 Specifically, the upper heating jacket 7 is fixed to the upper side of the lower cylinder 25, and the upper jacket heating medium outlet 21 is provided at the upper side of the upper heating jacket 7, and the upper jacket heating medium inlet 10 is provided at the lower side of the upper heating jacket 7. The upper jacket heating medium outlet 21 and the upper jacket heating medium inlet 10 constitute the upper jacket heating cycle, ensuring the temperature control effect of the upper jacket.

[0040] See also Figure 1 and Figure 2 Specifically, there are a number of baffles 8 , which are evenly distributed on the side and lower part of the side of the lower cylinder 25 , and the fixed scraper 9 is distributed on the upper part of the inner side of the lower cylinder 25 .

[0041] The movable scraper 12 is distributed at the lower part of the inner side surface of the lower cylinder 25. The fixed scraper 9 cooperates with the movable scraper 12 to ensure the uniformity of the liquid film.

[0042] See also Figure 1 and Figure 2 Specifically, the lower heating jacket 19 is arranged at the bottom of the side of the lower cylinder 25, and the upper part of the side of the lower heating jacket 19 is provided with a lower jacket heating medium outlet 20, and the lower part of the side of the lower heating jacket 19 is provided with a lower jacket heating medium inlet 13. The lower jacket heating medium outlet 20 and the lower jacket heating medium inlet 13 constitute the heating cycle of the lower jacket, ensuring the temperature control effect of the lower jacket.

[0043] See also Figure 1 and Figure 2Specifically, a bottom heating jacket 15 is provided on the bottom side of the lower cylinder 25, a bottom jacket heating medium inlet 16 is provided on the outer bottom of the bottom heating jacket 15, and a bottom jacket heating medium outlet 18 is provided on the outer top of the bottom heating jacket 15; the bottom jacket heating medium inlet 16 and the bottom jacket heating medium outlet 18 constitute a heating cycle of the bottom jacket, thereby ensuring the temperature control effect of the bottom jacket.

[0044] A heavy phase discharge port 17 is provided directly below the bottom of the lower cylinder 25. The heavy phase liquid is discharged from the heavy phase discharge port 17.

[0045] Embodiment 2:

[0046] Based on the above embodiment 1, further description is given.

[0047] See also Figure 2 Among them, A is a scraped film cracker, B is a heavy phase collection tank, C is a light phase collection tank, and D is a condenser. At this time, B collects the residual heavy phase liquid that completes cracking and cyclization in A, D condenses the light phase liquid produced in A, and C completes the collection.

[0048] Working principle:

[0049] First, connect the vacuum system and temperature control system. At this time, before the scraped film cracker is used, the vacuum system and temperature control system are connected in advance, and the vacuum system interface is connected to the vacuum light phase discharge port 4;

[0050] Then, the temperature control system is coordinated to control the internal heating of the scraped film cracker. At this time, the heating medium flows in from the upper heating jacket 7, the lower heating jacket 19 and the bottom heating jacket 15 respectively, and the heating of the upper half, the lower half and the bottom cylinder of the cracker is completed respectively. Specifically, the heating medium enters from the upper jacket heating medium inlet 10 of the upper heating jacket 7, is drained and distributed through the internal baffle 8, and then flows out from the upper jacket heating medium outlet 21 to complete the heating of the upper half of the cracker;

[0051] The heating medium of the lower heating jacket 19 enters from the lower jacket heating medium inlet 13, is drained and distributed by the baffle 8, and flows out from the lower jacket heating medium outlet 20, completing the heating of the lower half of the cracker;

[0052] The medium in the bottom heating jacket 15 of the bottom heavy phase discharge portion enters from the bottom jacket heating medium inlet 16 and flows out from the bottom jacket heating medium outlet 18, thereby completing the heating of the bottom jacket.

[0053] Then, the oligomer material liquid is cracked and cyclized inside the scraped film cracker. At this time, the oligomer material liquid is introduced into the membrane cracker, and then, the uniform dispersion of the liquid, high-temperature and high-vacuum cyclization depolymerization, condensation, collection and reflux of the light phase material are successively completed inside the scraped film cracker to complete the cracking and cyclization of the oligomer material liquid. Specifically, the liquid to be cracked and cyclized is added from the right feed port 6 and the left feed port 22 respectively, and is continuously and evenly dispersed on the inner wall of the cracker under the centrifugal distribution of the liquid distributor 5 and flows freely along the inner wall. Then, the stirring paddle 11 with a scraper is driven by the variable frequency motor 1 to rotate at the speed required by the process. At this time, the upper axial part of the stirring paddle 11 with a scraper is connected with the mechanical seal 3 by interference fit and sealed, and is connected to the variable frequency motor 1 through the coupling 2, and the axial bottom is fixed by the wear-resistant bearing 14;

[0054] During the stirring and scraping process, the clearance between the fixed scraper 9 and the movable scraper 12 and the inner wall of the cracker is designed to be in the range of 0.5 to 1.0 mm, wherein the spacing between the movable scraper 12 can be automatically adjusted with the rotation speed of the stirring shaft to ensure that the clearance is consistent;

[0055] When the feed liquid is in the scraped film cracker, the distribution of the distributor updates the interface of the fixed scraper 9 and the movable scraper 12, and the vacuum system and the temperature control system are coordinated to make the scraped film cracker under high vacuum and high temperature, and complete the depolymerization of the feed liquid. Then, the light phase feed liquid passes through the vacuum light phase discharge port 4, is separated from the system and collected by the subsequent equipment through condensation;

[0056] The heavy phase material in the liquid feed flows downward along the free flow inside the equipment, is discharged from the system through the heavy phase outlet 17, and is collected by subsequent equipment and then refluxed or otherwise disposed of, ultimately achieving cracking and cyclization of the oligomer liquid feed, and separating the required light phase material and disposing of a small amount of heavy phase material generated.

[0057] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A novel scraping film lysing device, comprising a main body (23) and a variable frequency motor (1) fixed to the top of the main body (23), wherein the output end of the variable frequency motor (1) is provided with a coupling (2), and a mechanical seal (3) is connected to the coupling (2) through a transmission, and the mechanical seal (3) is movably connected to the outer top of the main body (23), characterized in that: A stirring paddle (11) with a scraper is arranged inside the main body (23); a liquid distributor (5) is fixedly arranged at the middle and upper part of the inner side of the main body (23); the top end of the stirring paddle (11) with a scraper passes through the liquid distributor (5) and is connected to the mechanical seal (3) by interference fit; a wear-resistant bearing (14) is arranged at the bottom end of the stirring paddle (11) with a scraper and is movably connected to the inner bottom of the main body (23) through the wear-resistant bearing (14); A fixed scraper (9) is installed at the radial end of the middle part of the stirring blade (11) with a scraper, a movable scraper (12) is installed at the radial end of the bottom of the stirring blade (11) with a scraper, and an upper heating jacket (7), a baffle (8) and a lower heating jacket (19) are arranged on the side of the main body (23); The main body (23) comprises a vacuum chamber (24) and a lower cylinder (25).

2. A novel scraped film lyser according to claim 1, characterized in that: The vacuum chamber (24) and the lower cylinder (25) are integrally formed, and the inner diameter of the vacuum chamber (24) is greater than the inner diameter of the lower cylinder (25).

3. A novel scraped film lyser according to claim 1, characterized in that: A vacuum light phase discharge port (4) is fixedly arranged on the side of the vacuum chamber (24).

4. A novel scraped film lyser according to claim 1, characterized in that: The liquid distributor (5) is fixed at the connection channel between the vacuum chamber (24) and the lower cylinder (25), and a right feed port (6) is fixedly provided at one end of the liquid distributor (5), and a left feed port (22) is fixedly provided at the other end of the liquid distributor (5).

5. A novel scraped film lyser according to claim 1, characterized in that: The upper heating jacket (7) is fixed to the upper side of the lower cylinder (25), and an upper jacket heating medium outlet (21) is provided at the upper side of the upper heating jacket (7), and an upper jacket heating medium inlet (10) is provided at the lower side of the upper heating jacket (7).

6. A novel scraped film lyser according to claim 1, characterized in that: The baffles (8) are provided in a plurality and are evenly distributed on the side surface and the lower part of the side surface of the lower cylinder (25), and the fixed scrapers (9) are distributed on the upper part of the inner side surface of the lower cylinder (25).

7. A novel scraped film lyser according to claim 1, characterized in that: The lower heating jacket (19) is arranged at the bottom of the side of the lower cylinder (25), and the upper part of the side of the lower heating jacket (19) is provided with a lower jacket heating medium outlet (20), and the lower part of the side of the lower heating jacket (19) is provided with a lower jacket heating medium inlet (13).

8. A novel scraped film lyser according to claim 1, characterized in that: The movable scraper (12) is distributed on the lower part of the inner side surface of the lower cylinder (25).

9. A novel scraped film lyser according to claim 1, characterized in that: A bottom heating jacket (15) is provided on the bottom side of the lower cylinder (25), a bottom jacket heating medium inlet (16) is provided on the outer bottom of the bottom heating jacket (15), and a bottom jacket heating medium outlet (18) is provided on the outer top of the bottom heating jacket (15); A heavy phase discharge port (17) is provided just below the bottom of the lower cylinder (25).

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