Polymerizing kettle
By designing the discharge section of the feed pipe in the polymerization kettle to extend downward, the butadiene solution impacts the side wall and disperses, solving the problem of butadiene gel formation in the polymerization kettle, reducing maintenance frequency and improving production capacity.
Patent Information
- Application Number
- CN202420605723.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-27
AI Technical Summary
In existing polymerization kettles, butadiene aggregates at the port of the feeding tube to form a macromolecular gel, resulting in high maintenance frequency of polymerization kettle, frequent blockage of the gel filter and inner wall, reducing production capacity.
A polymerization kettle is designed, and the feeding pipe includes a mounting section and a discharge section arranged from top to bottom. The mounting section is fixed in the first mounting hole of the top wall of the polymerization kettle, and the discharge section extends downward away from one end of the installation section. The butadiene solution is sprayed out to impact the side wall of the polymerization kettle, dispersed and sputtered, reducing gel formation.
The amount of macromolecular gel formation at the port of the feeding tube is reduced, the frequency of maintenance of the polymerization kettle is reduced, the production capacity is improved, and the uniform mixing of butadiene and polymerization liquid is ensured.
Smart Images
Figure CN222131907U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rubber production, in particular to a polymerization kettle. Background Art
[0002] During the production of rubber such as styrene-butadiene rubber and butadiene rubber, butadiene needs to be added to the polymerization kettle. The first end of the existing polymerization kettle feeding pipe is located outside the kettle body, and the second end of the feeding pipe extends horizontally into the kettle body. The butadiene flowing out of the second end of the feeding pipe polymerizes with the polymerization liquid in the polymerization kettle to generate rubber. The inventor has found through research that when this type of polymerization kettle is used, the butadiene flowing out of the feeding pipe gathers at the port at the second end of the feeding pipe. The polymerization reaction occurring at the port at the second end of the feeding pipe releases a large amount of heat instantly, and it is easy to form a macromolecular gel. The macromolecular gel is easy to clog the glue filter of the polymerization kettle, resulting in the glue filter needing to be cleaned frequently. The gel will adhere to the inner wall of the polymerization kettle, resulting in the inner wall of the polymerization kettle needing to be cleaned frequently, increasing the maintenance frequency of the polymerization kettle and reducing the production capacity of the polymerization kettle. Utility Model Content
[0003] The technical problem to be solved by the utility model is that in the existing polymerization kettle, butadiene is gathered at the port of the feeding pipe and is easy to form a macromolecular gel, which leads to a high maintenance frequency of the polymerization kettle.
[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a polymerization kettle, comprising a kettle body and a feeding pipe for adding butadiene into the kettle body, the feeding pipe comprising a mounting section and a discharge section arranged in sequence from top to bottom, the top wall of the polymerization kettle is provided with a first mounting hole, the mounting section is fixedly penetrated in the first mounting hole, and the discharge section extends downwardly and toward the side wall of the polymerization kettle at one end away from the mounting section, so that the butadiene solution sprayed from the discharge section impacts the side wall of the polymerization kettle.
[0005] As a preferred solution, the mounting section is arranged vertically, and a middle portion of the mounting section is fixed in the first mounting hole.
[0006] As a preferred solution, a first connecting piece is fixed to the inner side of the top wall of the polymerization kettle, and one end of the first connecting piece away from the top wall of the polymerization kettle is fixed to the mounting section.
[0007] As a preferred solution, the polymerization kettle comprises a first check valve, the outlet end of the first check valve is communicated with the installation section, and the inlet end of the first check valve is communicated with a first butadiene supply pipe.
[0008] As a preferred solution, the inlet end of the first check valve is also connected to a first flushing liquid supply pipe, in which a first valve body is provided, and in which a second valve body is provided.
[0009] As a preferred embodiment, one end of the discharging section away from the installation section extends below the liquid level of the polymerization liquid in the polymerization kettle.
[0010] As a preferred solution, a second mounting hole is provided at the bottom of the polymerization kettle and is arranged obliquely up and down, and an end of the second mounting hole close to the outside of the polymerization kettle is higher than an end of the second mounting hole close to the inside of the polymerization kettle;
[0011] A sleeve is fixed in the second mounting hole, a first flange is fixed to one end of the sleeve located outside the polymerization kettle, a feeding pipe for adding butadiene to the bottom of the kettle body is inserted in the sleeve, a second flange is fixed to one end of the feeding pipe located outside the polymerization kettle, and the second flange is detachably connected to the first flange.
[0012] As a preferred solution, a stirring paddle is provided in the polymerization kettle near the discharge port of the feeding pipe.
[0013] As a preferred solution, the polymerization kettle comprises a second check valve, the outlet end of the second check valve is connected to one end of the feed pipe located outside the polymerization kettle, and the inlet end of the second check valve is connected to a second butadiene supply pipe.
[0014] As a preferred solution, the inlet end of the second check valve is also connected to a second flushing liquid supply pipe, a third valve body is provided in the second flushing liquid supply pipe, and a fourth valve body is provided in the second butadiene supply pipe.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] The utility model discloses a polymerization kettle, comprising a kettle body and a feeding pipe for adding butadiene into the kettle body, wherein the feeding pipe comprises a mounting section and a discharging section which are sequentially arranged from top to bottom, a first mounting hole is arranged on the top wall of the polymerization kettle, the mounting section is fixedly penetrated in the first mounting hole, an end of the discharging section away from the mounting section extends downward and toward a side wall of the polymerization kettle, and after the butadiene solution sprayed from the discharging section impacts the side wall of the polymerization kettle, it will be splashed around, so that the butadiene solution can be dispersed, the formation amount of macromolecular gel at the feeding pipe port is reduced, thereby reducing the maintenance frequency of the polymerization kettle and improving the production capacity of the polymerization kettle. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the polymerization kettle of the utility model;
[0018] Figure 2 It is a schematic diagram of the top structure of the polymerization kettle of the utility model;
[0019] Figure 3 This is a schematic diagram of the bottom structure of the polymerization kettle of the utility model;
[0020] In the figure, 1, kettle body, 2, feeding pipe, 21, installation section, 22, discharge section, 3, first connecting piece, 41, first check valve, 42, first butadiene supply pipe, 43, first flushing liquid supply pipe, 44, first valve body, 45, second valve body, 46, fifth valve body, 51, sleeve, 52, first flange, 61, feeding pipe, 62, second flange, 63, second check valve, 64, second butadiene supply pipe, 65, second flushing liquid supply pipe, 66, third valve body, 67, fourth valve body, 68, sixth valve body. DETAILED DESCRIPTION
[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0022] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, 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 therefore cannot be understood as a limitation on the present utility model. It should be understood that the terms "first", "second", etc. are used in the present utility model to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.
[0023] like Figures 1 to 3 As shown, a preferred embodiment of a polymerization kettle of the utility model comprises a kettle body 1 and a feeding pipe 2 for adding butadiene into the kettle body 1, the feeding pipe 2 comprises a mounting section 21 and a discharging section 22 arranged in sequence from top to bottom, the top wall of the polymerization kettle is provided with a first mounting hole, the mounting section 21 is fixedly penetrated in the first mounting hole, and the discharging section 22 extends downward and toward the side wall of the polymerization kettle at one end away from the mounting section 21, so that the butadiene solution sprayed from the discharging section 22 impacts the side wall of the polymerization kettle. After the butadiene solution sprayed from the discharging section 22 impacts the side wall of the polymerization kettle, it will splash around, so that the butadiene solution can be dispersed, reducing the amount of macromolecular gel formed at the end of the feeding pipe 2, thereby reducing the maintenance frequency of the polymerization kettle and improving the production capacity of the polymerization kettle; the discharging section 22 is arranged to tilt downward, so that the butadiene solution after sputtering flows to the bottom of the polymerization kettle, so as to facilitate the mixing of butadiene and the polymer solution.
[0024] In this embodiment, the installation section 21 is arranged vertically, and the middle part of the installation section 21 is fixed in the first installation hole. The vertically arranged installation section 21 facilitates the flow of the butadiene solution in the installation section 21 .
[0025] In order to ensure the stability of the feeding pipe 2 in the polymerization kettle, a first connecting piece 3 is fixed to the inner side of the top wall of the polymerization kettle, and one end of the first connecting piece 3 away from the top wall of the polymerization kettle is fixed to the mounting section 21. When the stirring paddle in the polymerization kettle rotates, it will drive the polymer liquid to flow. The setting of the connecting piece ensures the stability of the feeding pipe 2. Specifically, the connecting piece includes two support rods arranged at an angle, one end of the support rod is welded to the inner wall of the polymerization kettle, and the other end of the support rod is welded to the outer wall of the mounting section 21. The paddle support rod is connected to the mounting section 21, which can make the distance between the support rod and the discharge port of the feeding pipe 2 longer. Specifically, the support rod is located above the liquid level of the polymer liquid in the polymerization kettle.
[0026] To prevent the polymerization liquid in the polymerization kettle from backflowing due to explosion, in this embodiment, the polymerization kettle includes a first check valve 41, the outlet end of the first check valve 41 is connected to the installation section 21, and the inlet end of the first check valve 41 is connected to the first butadiene supply pipe 42.
[0027] In this embodiment, in order to prevent butadiene from remaining in the feeding pipe 2, the inlet end of the first check valve 41 is also connected to a first flushing liquid supply pipe 43, a first valve body 44 is provided in the first flushing liquid supply pipe 43, and a second valve body 45 is provided in the first butadiene supply pipe 42. Specifically, when butadiene needs to be added, the second valve body 45 is opened and the first valve body 44 is closed, and when the feeding pipe 2 needs to be flushed, the second valve body 45 is closed and the first valve body 44 is opened.
[0028] In order to prevent butadiene from entering the portion of the top of the polymerization kettle that is not filled with polymerization liquid and vaporizing, in this embodiment, one end of the discharge section 22 away from the installation section 21 extends below the liquid level of the polymerization liquid in the polymerization kettle.
[0029] In this embodiment, in order to improve the uniformity of the distribution of butadiene in the polymerization kettle, the lower part of the polymerization kettle is provided with a second mounting hole arranged obliquely up and down, and the end of the second mounting hole close to the outside of the polymerization kettle is higher than the end of the second mounting hole close to the inside of the polymerization kettle; a sleeve 51 is fixed in the second mounting hole, and a first flange 52 is fixed at the end of the sleeve 51 located outside the polymerization kettle, and a feeding pipe 61 for adding butadiene to the bottom of the kettle body 1 is inserted in the sleeve 51, and a second flange 62 is fixed at the end of the feeding pipe 61 located outside the polymerization kettle, and the second flange 62 is detachably connected to the first flange 52. Specifically, the sleeve 51 is arranged to be inclined up and down, and the end of the sleeve 51 located inside the polymerization kettle is lower than the end of the sleeve 51 located outside the polymerization kettle. When the lower end of the polymerization kettle is opened to unload, the glue liquid existing in the gap between the feed pipe 61 and the sleeve 51 can flow downward smoothly to avoid residual glue liquid in the gap. When the feed pipe 61 is pulled out to perform maintenance on the polymerization kettle, the first flange 52 and the second flange 62 can be disassembled. In this embodiment, the second flange 62 and the first flange 52 are connected by bolts.
[0030] When producing styrene-butadiene rubber and butadiene rubber, when adding butadiene into the polymerization kettle, the ratio of butadiene added to the bottom of the polymerization kettle: butadiene added to the top of the polymerization kettle is between 1:1 and 7:3, which can effectively slow down the instantaneous addition of butadiene and significantly increase the uniformity of butadiene in the polymerization liquid, which is conducive to the smooth progress of the reaction and reduces the situation of polymer macromolecular gel and glue hanging on the kettle wall.
[0031] In order to prevent the butadiene flowing out from the end of the feeding pipe 61 from agglomerating, in this embodiment, a stirring paddle is provided in the polymerization kettle near the outlet of the feeding pipe 61 .
[0032] To prevent the polymerization liquid from flowing back to the second butadiene supply pipe 64, in this embodiment, the polymerization kettle includes a second check valve 63, the outlet end of the second check valve 63 is connected to one end of the feed pipe 61 located outside the polymerization kettle, and the inlet end of the second check valve 63 is connected to the second butadiene supply pipe 64.
[0033] To avoid residual butadiene in the feeding pipe 61 , in this embodiment, the inlet end of the second check valve 63 is also connected to a second flushing liquid supply pipe 65 , in which a third valve body 66 is provided, and the second butadiene supply pipe 64 is provided with a fourth valve body 67 .
[0034] To ensure the safety inside the polymerization kettle when maintaining the polymerization kettle, in this embodiment, the end of the feeding pipe 2 is connected to the fifth valve body 46, and the end of the feed pipe 61 is connected to the sixth valve body 68. When the polymerization kettle needs to be maintained, the fifth valve body 46 and the sixth valve body 68 are closed to eliminate the risk of butadiene flowing into the polymerization kettle and ensure the safety of the workers in the polymerization kettle.
[0035] In summary, the polymerization kettle of the utility model comprises a kettle body 1 and a feeding pipe 2 for adding butadiene into the kettle body 1, the feeding pipe 2 comprises a mounting section 21 and a discharging section 22 arranged in sequence from top to bottom, the top wall of the polymerization kettle is provided with a first mounting hole, the mounting section 21 is fixedly penetrated in the first mounting hole, the discharging section 22 extends downwardly and toward the side wall of the polymerization kettle at one end away from the mounting section 21, after the butadiene solution sprayed from the discharging section 22 impacts the side wall of the polymerization kettle, it will splash around, so that the butadiene solution can be dispersed, reducing the amount of macromolecular gel formed at the port of the feeding pipe 2, thereby reducing the maintenance frequency of the polymerization kettle and improving the production capacity of the polymerization kettle.
[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. A polymerization reactor, characterized in that: The invention comprises a kettle body (1) and a feeding pipe (2) for adding butadiene into the kettle body (1); the feeding pipe (2) comprises a mounting section (21) and a discharge section (22) arranged in sequence from top to bottom; a first mounting hole is provided on the top wall of the polymerization kettle; the mounting section (21) is fixedly inserted into the first mounting hole; an end of the discharge section (22) away from the mounting section (21) extends downwardly and toward the side wall of the polymerization kettle, so that the butadiene solution sprayed from the discharge section (22) impacts the side wall of the polymerization kettle.
2. The polymerization reactor according to claim 1, characterized in that The mounting section (21) is arranged vertically, and the middle portion of the mounting section (21) is fixed in the first mounting hole.
3. The polymerization reactor according to claim 1, characterized in that A first connecting piece (3) is fixed to the inner side of the top wall of the polymerization kettle, and one end of the first connecting piece (3) away from the top wall of the polymerization kettle is fixed to the mounting section (21).
4. The polymerization reactor according to claim 1, characterized in that The polymerization kettle comprises a first check valve (41), the outlet end of the first check valve (41) is communicated with the installation section (21), and the inlet end of the first check valve (41) is communicated with a first butadiene supply pipe (42).
5. The polymerization reactor according to claim 4, characterized in that: The inlet end of the first check valve (41) is also connected to a first flushing liquid supply pipe (43), a first valve body (44) is provided in the first flushing liquid supply pipe (43), and a second valve body (45) is provided in the first butadiene supply pipe (42).
6. The polymerization reactor according to claim 1, characterized in that: One end of the discharge section (22) away from the installation section (21) extends below the liquid level of the polymerization liquid in the polymerization kettle.
7. The polymerization reactor according to claim 1, characterized in that: The lower part of the polymerization kettle is provided with a second mounting hole arranged obliquely up and down, and an end of the second mounting hole close to the outside of the polymerization kettle is higher than an end of the second mounting hole close to the inside of the polymerization kettle; A sleeve (51) is fixed in the second mounting hole, a first flange (52) is fixed to one end of the sleeve (51) located outside the polymerization kettle, a feed pipe (61) for adding butadiene to the bottom of the kettle body (1) is inserted in the sleeve (51), a second flange (62) is fixed to one end of the feed pipe (61) located outside the polymerization kettle, and the second flange (62) is detachably connected to the first flange (52).
8. The polymerization reactor according to claim 7, characterized in that: A stirring paddle is provided in the polymerization kettle near the discharge port of the feed pipe (61).
9. The polymerization reactor according to claim 7, characterized in that: The polymerization kettle comprises a second check valve (63), the outlet end of the second check valve (63) is connected to one end of the feed pipe (61) located outside the polymerization kettle, and the inlet end of the second check valve (63) is connected to a second butadiene supply pipe (64).
10. The polymerization reactor according to claim 9, characterized in that: The inlet end of the second check valve (63) is also connected to a second flushing liquid supply pipe (65), a third valve body (66) is provided in the second flushing liquid supply pipe (65), and a fourth valve body (67) is provided in the second butadiene supply pipe (64).