A double loop polyethylene plant

Abstract

The utility model relates to the technical field of petroleum chemical industry discloses a double loop pipe polyethylene device, including reactor, the top transverse fixedly connected with support of reactor, the top fixedly connected with mixing mechanism of support. In the utility model, through the setting of driving motor, rotating lever and stirring rod, isopropanol can be injected into the inside of reactor and isobutane is mutually soluble, driving motor works when starting at this moment, driving motor work drives rotating lever to rotate clockwise, rotating lever rotation drives stirring rod to rotate, and stirring rod rotation pushes material flow, diffusion to the kinetic energy of isopropanol fluid in the inside of reactor, and the shear force produced by stirring can break the concentration gradient and phase interface in the inside of material, promotes the diffusion mixing of molecular level to accelerate the uniform mixing of both, makes fresh isobutane more efficiently dilutes isopropanol, shortens the time of replacement to qualified concentration, reduces the time -consuming of circulating replacement in traditional craft.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical technology, and in particular to a double-ring polyethylene device. Background Technology

[0002] A double-loop polyethylene unit is a chemical equipment used to produce polyethylene. It typically employs a slurry process and generally uses two loop reactors connected in series.

[0003] After purification, raw materials such as ethylene, comonomer, isobutane solvent, and hydrogen are pressurized and fed into the reaction system. Chromium-based or titanium-based catalysts are also injected into the reactor after activation. The reactor equipment has a long switching time for specific production steps, resulting in huge losses in output and energy consumption. The solid polymer in the reactor equipment must be completely poured out, which not only produces a large number of unqualified products, but also requires a lot of time to re-establish the polymerization reaction conditions. The complicated steps and the addition of a large amount of isopropanol make it difficult to separate isopropanol from isobutane in the reactor. Even a little isopropanol residue will deactivate the newly injected catalyst, increasing the difficulty of switching production.

[0004] Therefore, a double-loop polyethylene device is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Given that the existing technologies mentioned above suffer from significant energy losses, deactivation of newly injected catalysts, and increased difficulty in switching production, the existing technologies are problematic.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A double-ring polyethylene apparatus includes: a reactor and a support; the support is laterally fixed to the top of the reactor; and further includes:

[0009] The reactor comprises a mixing mechanism, a lifting mechanism, and a transmission assembly; the mixing mechanism is fixedly connected to the top of the support, the lifting mechanism is fixedly connected to the left and right sides of the bottom of the reactor inner wall, and the transmission assembly is located on the surface of the mixing mechanism and corresponds to the position of the corresponding lifting mechanism.

[0010] As a further embodiment of this utility model: the mixing mechanism includes: a drive motor, a rotating rod, and a stirring rod; the drive motor is fixedly connected to the top of the support, the rotating rod is fixedly connected to the output end of the drive motor, and the stirring rod is fixedly connected to the bottom of the rotating rod and extends into the interior of the reactor.

[0011] As a further embodiment of this utility model: the lifting mechanism includes: an electric telescopic rod, a disc, and a scraper; the electric telescopic rod is fixedly connected to the left and right sides of the bottom of the reactor inner wall, the disc is slidably connected to the surface of the rotating rod, and the scraper is fixedly connected to the left and right sides of the disc.

[0012] As a further embodiment of this utility model: the transmission component includes: a toothed ring and a toothed groove; the toothed ring is located on the surface of the rotating rod, the toothed groove is located on the surface of the disc and corresponds to the position of the toothed ring, and the toothed ring and the toothed groove mesh with each other.

[0013] As a further improvement of this utility model: the number of scrapers is six, and they are arranged in a ring, and the scrapers are used in conjunction with the disc.

[0014] As a further improvement of this invention: the front end of the reactor is movably connected to an inspection door via a hinge, and the inspection door is used in conjunction with the reactor.

[0015] As a further embodiment of this utility model: supports are fixedly connected to the left and right sides of the bottom of the reactor inner wall and to the surface of the electric telescopic rod, and the supports are used in conjunction with the electric telescopic rod.

[0016] As a further improvement of this invention: the bottom of the reactor is provided with an outlet, which is used in conjunction with the reactor.

[0017] As a further improvement of this utility model: support feet are fixedly connected to the four corners of the bottom of the reactor, the reactor is used in conjunction with the support feet, and one side of the scraper is in contact with the inner wall of the reactor.

[0018] As a further improvement of this utility model: the electric telescopic rod pushes the disc upward, the disc moves vertically along the surface of the rotating rod, and the tooth groove is embedded in the inside of the tooth ring.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. In this utility model, the configuration of a drive motor, a rotating rod, and a stirring rod enables isopropanol to be injected into the reactor and become miscible with isobutane. At this time, the drive motor is started, which drives the rotating rod to rotate clockwise. The rotation of the rotating rod drives the stirring rod to rotate. The rotation of the stirring rod promotes the flow and diffusion of the material by applying kinetic energy to the isopropanol fluid inside the reactor. The shear force generated by stirring can break the concentration gradient and phase interface inside the material, promoting molecular-level diffusion and mixing. Stirring can accelerate the uniform mixing of the two, making the fresh isobutane more efficient in diluting the isopropanol, shortening the time to replace to the qualified concentration, and reducing the time spent on cyclic replacement in traditional processes.

[0021] 2. In this utility model, the electric telescopic rod, disc, and scraper enable the electric telescopic rod to push the disc upward, which in turn drives the scraper to follow until the disc and the rotating rod mesh with each other. This allows the disc to rotate with the rotating rod, causing the scraper to coat the inner wall of the reactor with material. This achieves the effect of adsorbing isopropanol onto the wall surface due to its polar force, preventing residues from affecting subsequent mixing processes. By scraping the inner wall of the reactor with a rotating disc scraper, the mixing process is improved, reducing the time spent on circulation and replacement in traditional processes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the rotating rod and stirring rod of this utility model;

[0024] Figure 3 This is a schematic diagram of the structural support of this utility model;

[0025] Figure 4 This is a schematic diagram of the toothed ring and toothed groove of this utility model;

[0026] Figure 5 This is a schematic diagram of the structural support and electric telescopic rod of this utility model.

[0027] Legend:

[0028] 1. Reactor; 2. Support; 3. Mixing mechanism; 31. Drive motor; 32. Rotary rod; 33. Stirring rod; 4. Lifting mechanism; 41. Electric telescopic rod; 42. Disc; 43. Scraper; 5. Transmission assembly; 51. Gear ring; 52. Gear groove; 6. Inspection door; 7. Support; 8. Discharge port. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0032] Example 1:

[0033] Please see Figure 1 - Figure 5 This is the first embodiment of the present invention.

[0034] This embodiment provides a double-ring polyethylene device, including a reactor 1. A support 2 is horizontally fixedly connected to the top of the reactor 1. A mixing mechanism 3 is fixedly connected to the top of the support 2. The mixing mechanism 3 includes a drive motor 31, a rotating rod 32, and a stirring rod 33. The drive motor 31 is fixedly connected to the top of the support 2. The rotating rod 32 is fixedly connected to the output end of the drive motor 31. The stirring rod 33 is fixedly connected to the bottom of the rotating rod 32 through the interior of the reactor 1. Lifting mechanisms 4 are fixedly connected to the left and right sides of the bottom of the inner wall of the reactor 1.

[0035] When in use, isopropanol is injected into the interior of reactor 1. Although isopropanol and isobutane are miscible, the drive motor 31 is started. The drive motor 31 drives the rotating rod 32 to rotate clockwise. The rotation of the rotating rod 32 drives the stirring rod 33 to rotate. The rotation of the stirring rod 33 promotes the flow and diffusion of the isopropanol fluid inside reactor 1 with its kinetic energy. The shear force generated by stirring can break the concentration gradient and phase interface inside the material, promote molecular-level diffusion and mixing. Stirring can accelerate the uniform mixing of the two, making the fresh isobutane more efficient at diluting the isopropanol, shortening the time to replace to the qualified concentration, and reducing the time spent on cyclic replacement in the traditional process.

[0036] Reference Figures 1-4 The lifting mechanism 4 includes an electric telescopic rod 41, a disc 42, and a scraper 43. The electric telescopic rod 41 is fixedly connected to the left and right sides of the bottom of the inner wall of the reactor 1. The disc 42 is slidably connected to the top of the electric telescopic rod 41 and sleeved on the surface of the rotating rod 32. The scraper 43 is fixedly connected to the left and right sides of the disc 42. One side of the scraper 43 contacts the inner wall of the reactor 1. The transmission assembly 5 is fixedly connected to the surface of the rotating rod 32 and the position corresponding to the disc 42.

[0037] By setting up the lifting mechanism 4, the electric telescopic rod 41 can work to push the disc 42 to move upward. The upward movement of the disc 42 drives the scraper 43 to move accordingly. When the disc 42 rises steadily along the rotating rod 32 to the meshing point, the mechanical synchronous rotation is achieved.

[0038] The transmission assembly 5 includes a toothed ring 51 and a toothed groove 52. The toothed ring 51 is fixedly connected to the surface of the rotating rod 32 at the position corresponding to the disk 42. The toothed groove 52 is opened on the surface of the disk 42 at the position corresponding to the toothed ring 51. The toothed ring 51 and the toothed groove 52 mesh with each other.

[0039] By setting the transmission component 5, the toothed groove 52 and the toothed ring 51 of the rotating rod 32 can mesh and embed with each other during the upward movement of the disc 42, so that the rotating rod 32 rotates and drives the toothed ring 51 and the disc 42 to rotate synchronously. This causes the polar force of isopropanol in the reactor 1 to be adsorbed on the wall, so that it leaves residues that affect subsequent mixing and processing. The rotation of the disc 42 causes the scraper 43 to scrape the material from the inner wall of the reactor 1.

[0040] Example 2:

[0041] Please see Figure 1 - Figure 5 This is the second embodiment of the present utility model.

[0042] For example, there are six scrapers 43 arranged in a ring. The scrapers 43 work together with the disc 42. The scrapers 43 can assist the disc 42 in its work and scrape the material at the same time, thus avoiding the slow working efficiency of a single set of scrapers 43 from affecting the working speed.

[0043] The front end of the reactor 1 is connected to the inspection door 6 via a hinge. The inspection door 6 works in conjunction with the reactor 1. The inspection door 6 assists the reactor 1 in its operation and facilitates inspection and maintenance, thus avoiding the inconvenience of manual access for maintenance during long-term operation of the reactor 1.

[0044] Supports 7 are fixedly connected to the bottom left and right sides of the inner wall of reactor 1 and sleeved on the surface of electric telescopic rod 41. The supports 7 are used in conjunction with electric telescopic rod 41. The support 7 can assist electric telescopic rod 41 in its work and also play a supporting role, avoiding the phenomenon of electric telescopic rod 41 shaking and deforming due to excessive load.

[0045] The bottom of the reactor 1 is provided with an outlet 8, which is used in conjunction with the reactor 1. The outlet 8 is designed to assist the reactor 1 in its operation and to discharge the raw materials into the next process, thus preventing the raw materials inside the reactor 1 from being unable to be discharged and thus causing them to remain for too long.

[0046] Support feet are fixedly connected to the four corners of the bottom of reactor 1. Reactor 1 and support feet work together to support reactor 1 stably and prevent shaking or displacement during the operation of the internal machinery of reactor 1.

[0047] Working principle: During operation, isopropanol is injected into reactor 1. Although isopropanol and isobutane are miscible, the drive motor 31 is activated, causing the rotating rod 32 to rotate clockwise. The rotation of the rotating rod 32, in turn, causes the stirring rod 33 to rotate. The rotation of the stirring rod 33 exerts kinetic energy on the isopropanol fluid inside reactor 1, promoting material flow and diffusion. The shear force generated by stirring breaks down the concentration gradient and phase interface within the material, promoting molecular-level diffusion and mixing. Stirring accelerates the uniform mixing of the two. Then, the electric telescopic rod 41 is activated, pushing... The disc 42 moves upward and vertically along the surface of the rotating rod 32, causing the toothed groove 52 to embed into the toothed ring 51. This causes the rotating rod 32 to rotate, which in turn drives the disc 42 to rotate. The rotation of the disc 42 drives the scraper 43 to rotate, thereby adsorbing isopropanol onto the wall of the reactor 1 due to its polarity, preventing residue from affecting subsequent mixing and processing. The rotation of the disc 42 causes the scraper 43 to scrape the inner wall of the reactor 1, making the fresh isobutane more efficient at diluting the isopropanol, shortening the time to reach the qualified concentration, and reducing the time spent on cyclic replacement in traditional processes.

[0048] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0049] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0050] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A double-loop polyethylene device, characterized in that: include: Reactor (1) and support (2); The support (2) is horizontally fixed to the top of the reactor (1), and also includes: The mixing mechanism (3), the lifting mechanism (4), and the transmission assembly (5) are fixedly connected to the top of the support (2), the lifting mechanism (4) is fixedly connected to the left and right sides of the bottom of the inner wall of the reactor (1), and the transmission assembly (5) is located on the surface of the mixing mechanism (3) and corresponds to the position of the corresponding lifting mechanism (4).

2. The double-ring polyethylene apparatus according to claim 1, characterized in that: The mixing mechanism (3) includes: a drive motor (31), a rotating rod (32) and a stirring rod (33); the drive motor (31) is fixedly connected to the top of the support (2), the rotating rod (32) is fixedly connected to the output end of the drive motor (31), and the stirring rod (33) is fixedly connected to the bottom of the rotating rod (32) and extends into the interior of the reactor (1).

3. The double-ring polyethylene device according to claim 1, characterized in that: The lifting mechanism (4) includes: an electric telescopic rod (41), a disc (42) and a scraper (43); the electric telescopic rod (41) is fixedly connected to the left and right sides of the bottom of the inner wall of the reactor (1), the disc (42) is slidably connected to the surface of the rotating rod (32), and the scraper (43) is fixedly connected to the left and right sides of the disc (42).

4. A double-ring polyethylene apparatus according to claim 3, characterized in that: The transmission assembly (5) includes a toothed ring (51) and a toothed groove (52); the toothed ring (51) is located on the surface of the rotating rod (32), and the toothed groove (52) is located on the surface of the disc (42) and corresponds to the position of the toothed ring (51); the toothed ring (51) and the toothed groove (52) mesh with each other.

5. A double-ring polyethylene apparatus according to claim 3, characterized in that: The number of scrapers (43) is six, and they are arranged in a ring. The scrapers (43) are used in conjunction with the disc (42).

6. A double-ring polyethylene apparatus according to claim 1, characterized in that: The front end of the reactor (1) is movably connected to an inspection door (6) via a hinge, and the inspection door (6) is used in conjunction with the reactor (1).

7. A double-ring polyethylene apparatus according to claim 3, characterized in that: Supports (7) are fixedly connected to the bottom left and right sides of the inner wall of the reactor (1) and to the surface of the electric telescopic rod (41). The supports (7) are used in conjunction with the electric telescopic rod (41).

8. A double-ring polyethylene apparatus according to claim 1, characterized in that: The bottom of the reactor (1) is provided with an outlet (8), which is used in conjunction with the reactor (1).

9. A double-ring polyethylene apparatus according to claim 3, characterized in that: The reactor (1) is fixedly connected to four corners at the bottom. The reactor (1) is used in conjunction with the support feet. One side of the scraper (43) is in contact with the inner wall of the reactor (1).

10. A double-ring polyethylene apparatus according to claim 4, characterized in that: The electric telescopic rod (41) is used to push the disc (42) upward, the disc (42) moves vertically along the surface of the rotating rod (32), and the toothed groove (52) is embedded in the interior of the toothed ring (51).

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