Polymerization reaction kettle
By designing a scraper assembly, and utilizing magnetic limiting components to contact and separate from the inner wall of the vessel during the forward and reverse rotation of the stirring assembly, the problems of scraper wear and uneven mixing are solved, achieving efficient removal of adhering materials and protection of the vessel body.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAILIHE CHEM ZHONGSHAN
- Filing Date
- 2025-05-06
- Publication Date
- 2026-05-05
AI Technical Summary
In existing polymerization reactors, the scraper blades wear down when they come into contact with the inner wall of the reactor during stirring, affecting heat transfer and potentially causing safety accidents. Incomplete scraping also leads to uneven mixing and quality problems.
Design a scraper assembly, including a scraper, a first limiting member, and a second limiting member, which are connected by magnetic adsorption. The scraper contacts and separates from the inner wall of the vessel when the stirring assembly rotates in the forward and reverse directions, respectively, so as to effectively scrape off the material adhering to the vessel and avoid wear.
It effectively removes substances adhering to the inner wall of the vessel, ensuring uniform mixing of materials, preventing vessel wear, and improving production quality and safety.
Smart Images
Figure CN224194728U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of reactor technology, specifically to a polymerization reactor. Background Technology
[0002] In polymerization processes, the reactor is the core equipment, and the uniformity of material mixing inside directly determines the reaction efficiency and the quality of the final product. During polymerization, the inner wall of the chemical reactor is easily adhered to by the polymerized materials, affecting the heat transfer effect of the reactor during production. Severe adhesion can even lead to safety accidents. The adhered material gradually increases over time, eventually detaching. This detached material, mixed into the finished product, can cause numerous quality problems such as yellow-black spots, impurities, plasticized flakes, and "fish-eye" defects.
[0003] The current industry standard solution to this problem is to add scrapers or flexible blades to the stirring shaft to remove the adhering substances from the inner wall through physical contact. However, this method of stirring the shaft at high speeds can lead to problems such as increased wear on the inner wall of the vessel due to the continuous contact between the scraper and the vessel's inner wall, and the scraping may damage the inner wall. Summary of the Invention
[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a polymerization reactor, the technical solution of which includes:
[0005] A polymerization reactor includes a reactor body and a stirring assembly disposed within the reactor body. The stirring assembly includes a stirring shaft and a stirring paddle mounted outside the stirring shaft. A scraper assembly is mounted on the end of the stirring paddle away from the stirring shaft. The scraper assembly has a scraper. When the stirring assembly rotates forward within the reactor body, the scraper contacts the inner wall of the reactor body. When the stirring assembly rotates in reverse within the reactor body, a gap exists between the scraper and the inner wall of the reactor body.
[0006] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the scraper assembly includes a rotating component and a first limiting component. The rotating component is mounted on the stirring paddle, the first limiting component is mounted on the rotating component, and the scraper is vertically rotatable and mounted on the rotating component. When the stirring assembly rotates forward in the reactor, the scraper adheres to the first limiting component and contacts the inner wall of the reactor under the action of the material in the reactor. When the stirring assembly rotates in reverse in the reactor, the first limiting component rotates away from the first limiting component and the inner wall of the reactor under the action of the material.
[0007] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the scraper assembly further includes a second limiting member, the second limiting member is located on the side of the scraper away from the first limiting member, and when the stirring assembly rotates in the opposite direction in the reactor, the scraper is in contact with the second limiting member under the action of the material in the reactor.
[0008] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the first limiting member and the second limiting member are both magnetic members, the scraper includes a connecting part and a soft scraping part, and the connecting part can be magnetically attracted to the first limiting member or the second limiting member.
[0009] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the stirring assembly further includes a connecting rod, the connecting rod is vertically installed at the end of the stirring paddle away from the stirring shaft, and the scraper assembly is installed on the connecting rod.
[0010] The beneficial effects of this utility model are:
[0011] In this application, when the scraper needs to contact the inner wall of the reactor, such as in the early stage of polymerization or when there is residue sticking to the inner wall of the reactor, the stirring assembly rotates in the forward direction inside the reactor, and the scraper contacts the inner wall of the reactor. At this time, the stirring shaft can rotate to make the scraper contact the inner wall of the reactor. After the scraper contacts the inner wall of the reactor, it scrapes off the residue sticking to the inner wall of the reactor, avoiding uneven mixing of materials and excessively high local concentrations caused by residue sticking to the reactor, thus ensuring production quality.
[0012] When the scraper does not need to contact the inner wall of the vessel, the stirring shaft is reversed. At this time, there is a gap between the scraper and the inner wall of the vessel, which avoids problems such as wear and tear on the inner wall of the vessel caused by long-term contact between the scraper and the inner wall, and potential damage to the inner wall due to scraping. Attached Figure Description
[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0014] Figure 1 This is a cross-sectional view of the polymerization reactor described in this embodiment;
[0015] Figure 2 This is a schematic diagram of the structure when the scraper and the first limiting member are in contact, as described in this embodiment;
[0016] Figure 3 This is a schematic diagram of the structure when the scraper and the second limiting member are in contact as described in this embodiment;
[0017] Figure 4 for Figure 3 Enlarged view of point A in the middle. Detailed Implementation
[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0019] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.
[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0021] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0022] Reference Figure 1-4 This application proposes an embodiment of a polymerization reactor, which includes a reactor body 10 and a stirring assembly 20 disposed within the reactor body 10. The stirring assembly 20 includes a stirring shaft 21 and a stirring paddle 22 mounted on the outside of the stirring shaft 21. A scraper assembly 30 is mounted on one end of the stirring paddle 22 away from the stirring shaft 21. The scraper assembly 30 has a scraper 31. When the stirring assembly 20 rotates forward within the reactor body 10, the scraper 31 contacts the inner wall of the reactor body 10. When the stirring assembly 20 rotates in the reverse direction within the reactor body 10, there is a gap between the scraper 31 and the inner wall of the reactor body 10.
[0023] In this application, when the scraper 31 needs to contact the inner wall of the reactor body 10, such as in the early stage of the polymerization reaction or when there is residue sticking to the inner wall of the reactor body 10, the stirring assembly 20 rotates in the forward direction inside the reactor body 10, and the scraper 31 contacts the inner wall of the reactor body 10. At this time, the stirring shaft 21 can rotate to make the scraper 31 contact the inner wall of the reactor body 10. After the scraper 31 contacts the inner wall of the reactor body 10, it scrapes off the residue sticking to the inner wall of the reactor body 10, avoiding uneven mixing of materials and excessively high local concentrations caused by residue sticking, thus ensuring production quality.
[0024] When the scraper 31 is not required to contact the inner wall of the reactor body 10, the stirring shaft 21 is controlled to reverse. At this time, a gap exists between the scraper 31 and the inner wall of the reactor body 10, preventing long-term contact between the scraper 31 and the inner wall of the reactor body 10, which could lead to wear and damage to the inner wall. Furthermore, the forward and reverse rotation of the stirring shaft 21 in this application can control whether to scrape the material from the inner wall of the reactor body 10, making it convenient to use. The forward and reverse rotation of the stirring shaft 21 can also reduce the dead zone area inside the polymerization reactor, improving the mixing effect.
[0025] In this embodiment, the stirring assembly 20 further includes a connecting rod 23, which is vertically installed at the end of the stirring paddle 22 away from the stirring shaft 21. The scraper assembly 30 is installed on the connecting rod 23, increasing the length of the scraper 31 and improving the contact area between the scraper 31 and the material and the inner wall of the vessel 10, thus ensuring the scraper 31's scraping effect on the material adhering to the vessel.
[0026] Specifically, the scraper assembly 30 includes a rotating member 32 and a first limiting member 33. The rotating member 32 is vertically and rotatably mounted on the stirring paddle 22, and the first limiting member 33 is mounted on the rotating member 32. The scraper 31 is vertically and rotatably mounted on the rotating member 32. When the stirring assembly 20 rotates in the forward direction within the vessel body 10, the scraper 31 adheres to the first limiting member 33 and contacts the inner wall of the vessel body 10 under the action of the material inside the vessel body 10. When the stirring assembly 20 rotates in the reverse direction within the vessel body 10, the first limiting member 33 rotates away from the first limiting member 33 and the inner wall of the vessel body 10 under the action of the material.
[0027] When the scraper 31 rotates forward with the stirring shaft 21, the scraper 31 is subjected to material resistance and adheres to the first limiting member 33 under the action of material resistance. At this time, the scraper 31 contacts the inner wall of the vessel body 10 and scrapes off the material adhering to the inner wall of the vessel body 10.
[0028] When the stirring shaft 21 switches to reverse rotation, the scraper 31 is subjected to reverse resistance from the first limiting member 33 side, causing the scraper 31 to move away from the first limiting member 33 under the action of material resistance, thus realizing that the scraper 31 is away from the inner wall of the vessel body 10.
[0029] Furthermore, the scraper assembly 30 also includes a second limiting member 34, which is located on the side of the scraper 31 away from the first limiting member 33. When the stirring assembly 20 rotates in the opposite direction inside the vessel 10, the scraper 31 is in contact with the second limiting member 34 under the action of the material inside the vessel 10.
[0030] To prevent the scraper 31 from rotating in the opposite direction with the stirring shaft 21, and to prevent the scraper 31 from failing to return to the state of adhering to the first limiting member 33 after rotating in the forward direction, this application also provides a second limiting member 34 on the side of the scraper 31 away from the first limiting member 33. When the scraper 31 rotates in the opposite direction with the stirring shaft 21, the scraper 31 adheres to the second limiting member 34 under the action of material resistance, so that the second limiting member 34 restricts the rotational displacement of the scraper 31. When the scraper 31 rotates in the forward direction, the scraper 31 can smoothly return to the position of re-adhering to the first limiting member 33.
[0031] Based on the above, in this embodiment, the first limiting member 33 and the second limiting member 34 are both magnetic components, and the scraper 31 includes a connecting part 311 and a soft scraping part 312. The connecting part 311 can be magnetically attracted to the first limiting member 33 or the second limiting member 34.
[0032] When the scraper 31 rotates in the forward direction with the stirring shaft 21, the scraper 31 is subjected to material resistance and is magnetically attracted to the first limiting member 33 under the action of material resistance, so as to stably limit the scraper 31 to the position in contact with the inner wall of the vessel 10.
[0033] When the scraper 31 rotates in the opposite direction as the stirring shaft 21 switches, the scraper 31 is released from the magnetic adsorption connection with the first limiting member 33 under the action of material resistance and rotates to be magnetically adsorbed and connected with the second limiting member 34, so as to stably limit the scraper 31 to the position of being in contact with the second limiting member 34.
[0034] The stirring assembly 20 also includes a connecting rod 23, which is vertically installed at the end of the stirring paddle 22 away from the stirring shaft 21. The rotating component 32 is a sleeve, which is sleeved on the connecting rod 23.
[0035] In this embodiment, the first limiting member 33 and the second limiting member 34 are both mounted on the connecting rod 23. The rotating member 32 is provided with a relief groove 321. The first limiting member 33 and the second limiting member 34 both pass through the relief groove. When the rotating member 32 and the scraper 31 switch between being in contact with the first limiting member 33 or the second limiting member 34 under the action of the material, the first limiting member 33 and the second limiting member 34 move within the relief groove 321.
[0036] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.
Claims
1. A polymerization reactor, characterized in that, The apparatus includes a vessel body (10) and a stirring assembly (20) disposed within the vessel body (10). The stirring assembly (20) includes a stirring shaft (21) and a stirring paddle (22) mounted on the outside of the stirring shaft (21). A scraper assembly (30) is mounted on one end of the stirring paddle (22) away from the stirring shaft (21). The scraper assembly (30) has a scraper (31). When the stirring assembly (20) rotates forward within the vessel body (10), the scraper (31) contacts the inner wall of the vessel body (10). When the stirring assembly (20) rotates in the reverse direction within the vessel body (10), there is a gap between the scraper (31) and the inner wall of the vessel body (10).
2. The polymerization reactor according to claim 1, characterized in that, The scraper assembly (30) includes a rotating component (32) and a first limiting component (33). The rotating component (32) is mounted on the stirring paddle (22), and the first limiting component (33) is mounted on the rotating component (32). The scraper (31) is mounted on the rotating component (32) in a vertically rotatable manner. When the stirring assembly (20) rotates in the forward direction within the vessel body (10), the scraper (31) adheres to the first limiting component (33) and contacts the inner wall of the vessel body (10) under the action of the material in the vessel body (10). When the stirring assembly (20) rotates in the reverse direction within the vessel body (10), the first limiting component (33) rotates away from the first limiting component (33) and the inner wall of the vessel body (10) under the action of the material.
3. The polymerization reactor according to claim 2, characterized in that, The scraper assembly (30) further includes a second limiting member (34), which is located on the side of the scraper (31) away from the first limiting member (33). When the stirring assembly (20) rotates in the opposite direction inside the vessel (10), the scraper (31) is in contact with the second limiting member (34) under the action of the material inside the vessel (10).
4. The polymerization reactor according to claim 3, characterized in that, The first limiting member (33) and the second limiting member (34) are both magnetic. The scraper (31) includes a connecting part (311) and a soft scraping part (312). The connecting part (311) can be magnetically connected to the first limiting member (33) or the second limiting member (34).
5. The polymerization reactor according to claim 3, characterized in that, The stirring assembly (20) also includes a connecting rod (23), which is vertically installed at the end of the stirring paddle (22) away from the stirring shaft (21). The rotating component (32) is a sleeve, which is sleeved on the connecting rod (23).