Solvent refining device for polymerization of condensed styrene-butadiene rubber

Abstract

The utility model discloses a solvent refining device for condensed styrene-butadiene rubber polymerization, and relates to the technical field of styrene-butadiene rubber processing. The reaction kettle comprises an outer shell, an inner shell fixedly connected with the inner walls of the upper end and the lower end of the outer shell, annular pipes annularly distributed on the inner walls of the inner shell, an input pipe located on the outer wall of the outer shell and an output end. A stirring structure, comprising a second motor fixedly arranged at the upper end of a shell, a rotating shaft located at the lower end of the second motor, a connecting rod located on the outer wall of the rotating shaft, stirring rods distributed on the outer wall of the connecting rod, twisting pieces spirally distributed on the outer wall of the rotating shaft, a conveying pipe connected to the outer sides of the twisting pieces in a sleeving mode and first motors fixedly arranged at the two ends of the shell. The stirring blade is positioned at the output end of the motor I and is positioned inside the side of the inner shell. According to the utility model, the spherical reaction kettle and the stirring structure are arranged, so that the problem that the uniformity and the conversion rate of a styrene butadiene rubber polymerization reaction are reduced due to the fact that only one-way stirring can be carried out in the reaction process of raw materials through the reaction kettle is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of styrene-butadiene rubber processing, in particular to a solvent refining device for condensed styrene-butadiene rubber polymerization. Background Art

[0002] In the solvent refining device for condensed styrene butadiene rubber polymerization, the reactor is the main equipment for the polymerization reaction of styrene butadiene rubber. In this process, raw materials such as styrene butadiene monomer and propylene monomer are added to the reactor together with catalysts and other additives to carry out polymerization reaction under appropriate temperature and pressure, thereby producing styrene butadiene rubber prepolymer. The reactor is equipped with a stirring structure, but most of them can only perform one-way stirring, and the mixing efficiency is low.

[0003] The Chinese patent discloses a solution polystyrene butadiene rubber concentrated polymerization device (authorization announcement number CN203448095U), which includes a reactor, an insulation layer, heat transfer oil, a styrene butadiene rubber liquid discharge pipe, a styrene rubber liquid feed pipe, a butadiene feed pipe, a stirring shaft, a motor, and a stirring blade. The reactor is provided with a heat transfer layer on the outside, and a hollow structure is formed between the heat transfer layer and the reactor. Heat transfer oil is injected between the heat transfer layer and the reactor. The top of the reactor is connected with the styrene butadiene rubber liquid discharge pipe, and the bottom is connected with the butadiene feed pipe and the styrene rubber liquid feed pipe. The upper part of the reactor is fixed with a stirring shaft, and the stirring shaft is connected with a motor. Multiple stirring blades are fixed on the stirring shaft from top to bottom. The beneficial effects of the utility model are as follows: the reaction raw materials enter the reaction zone from the bottom, and the stirring of the stirring shaft ensures the full mixing of the materials, and the materials are continuously discharged from the top of the reactor, which reduces the short circuit of the material flow and avoids repeated mixing, shortens the residence time of the materials in the reactor, and has good heat transfer and heat preservation effects.

[0004] This patented technology shortens the material reaction time when used, but it still has some shortcomings when used. The raw materials can only be stirred in one direction during the reaction of the reactor, which makes it impossible to directly mix the raw materials at different levels of the reactor, thereby prolonging the mixing time, thereby reducing the uniformity and conversion rate of the styrene-butadiene rubber polymerization reaction. Therefore, those skilled in the art provide a solvent refining device for condensed styrene-butadiene rubber polymerization to solve the problems raised in the above background technology. Utility Model Content

[0005] 1. Technical solution

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a solvent refining device for condensed styrene-butadiene rubber polymerization, comprising a reaction kettle,

[0008] The reactor comprises an outer shell, an inner shell fixedly connected to the inner walls of the upper and lower ends of the outer shell, an annular tube distributed in an annular shape on the inner wall of the inner shell, an input tube and an output end located on the outer wall of the outer shell;

[0009] as well as;

[0010] The stirring structure includes a second motor fixedly mounted on the upper end of an outer shell, a rotating shaft located at the lower end of the second motor, connecting rods symmetrically distributed on the outer wall of the rotating shaft, stirring rods equidistantly distributed on the outer wall of the connecting rods, twisted pieces spirally distributed on the outer wall of the rotating shaft, a conveying pipe sleeved on the outer side of the twisted pieces, a first motor fixedly mounted on both ends of the outer shell, and a stirring blade located at the output end of the first motor and located inside the side of the inner shell.

[0011] Furthermore, a cavity is provided inside the outer shell and the inner shell, and the input pipe and the output pipe both pass through the cavity;

[0012] Specifically, the input pipe transports the heat medium to the cavity, and the heat medium is output from the cavity through the output end.

[0013] Furthermore, a discharge pipe penetrating the outer shell is provided at the lower end of the inner shell, a valve is provided inside the discharge pipe, and a feed pipe penetrating the outer shell is provided inside the inner shell;

[0014] Specifically, the discharge pipe outputs the reacted raw materials in the inner shell, and the opening and closing of the discharge pipe is controlled by a valve.

[0015] Furthermore, a refrigeration pipe is installed inside the annular pipe, and both ends of the refrigeration pipe pass through the outer shell, and a temperature sensor located inside the inner shell is arranged at the upper end of the outer shell;

[0016] Specifically, the temperature sensor detects the temperature inside the inner shell, and the refrigeration pipe is connected to the refrigerator. When the cold medium is transported, the cold medium is diverted to the annular pipe.

[0017] Furthermore, the outer wall of the shell is sleeved with a supporting frame distributed in an annular shape;

[0018] Specifically, the support frame supports the reactor and lifts it above the ground for fixation.

[0019] Furthermore, support rods distributed in a circular array and connected to the inner wall of the inner shell are provided on the side of the lower end of the delivery pipe;

[0020] Specifically, the support rods support and fix the bottom of the conveying pipe to the inner shell, so that the conveying pipe is stable in use, and the gaps between the support rods do not hinder the discharge of the raw materials.

[0021] Furthermore, bearings are embedded and installed inside the two ends and the upper end of the inner shell and the outer shell, the rotating shaft and an output end of the motor are rotatably installed inside the bearings, and the stirring blades are sleeved on the outside of the stirring rod;

[0022] Specifically, the rotating shaft and the motor are rotatably supported inside the outer shell and the inner shell through bearings, and when the stirring blade rotates, the rotation of the stirring rod is not hindered.

[0023] 2. Beneficial effects

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] The utility model discloses a reactor for condensing styrene-butadiene rubber polymerization. When in use, the reactor is set to be a spherical shape with a hollow interior, and an adapted stirring structure is arranged inside the reactor to stir and mix the raw materials in one direction. During the mixing process, stirring liquids rotating longitudinally are arranged on both ends of the reactor to stir the raw materials longitudinally.

[0026] At the same time, the rotating shaft drives the shredder to rotate, and the raw materials inside the lower end of the reactor are shredded and sent to the raw materials at different heights with the center position as the axis to obtain a direct mixing process. The raw materials impact each other, which can achieve multi-dimensional and multi-directional stirring and mixing. The raw materials are mixed more evenly in the whole reactor, and there will be no dead corners or local uneven mixing of the raw materials in the reactor, thereby improving the uniformity and conversion rate of the polymerization reaction.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0030] Figure 2 This is a schematic diagram of the main three-dimensional structure of the housing of the utility model;

[0031] Figure 3 This is a schematic diagram of the main sectional three-dimensional structure of the utility model;

[0032] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the inner shell of the utility model;

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of the annular tube in a top view of the utility model.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 100, reactor; 101, outer shell; 102, discharge pipe; 103, valve; 104, input pipe; 105, output pipe; 106, refrigeration pipe; 107, temperature sensor; 108, feed pipe; 109, support frame; 110, annular pipe; 111, inner shell;

[0036] 200, stirring structure; 201, motor 1; 202, motor 2; 203, bearing; 204, stirring blade; 205, rotating shaft; 206, connecting rod; 207, stirring rod; 208, twisting piece; 209, conveying pipe; 210, supporting rod. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0039] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0040] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] Example 1

[0042] See also Figure 1-Figure 5 As shown, this embodiment is a solvent refining device for condensed styrene-butadiene rubber polymerization, comprising a reaction kettle 100,

[0043] The reactor 100 comprises an outer shell 101, an inner shell 111 fixedly connected to the inner walls of the upper and lower ends of the outer shell 101, an annular tube 110 distributed in an annular shape on the inner wall of the inner shell 111, an input tube 104 located on the outer wall of the outer shell 101, and an output end;

[0044] The outer shell 101 and the inner shell 111 are provided with cavities, and the input pipe 104 and the output pipe 105 both pass through the cavities;

[0045] The lower end of the inner shell 111 is provided with a discharge pipe 102 penetrating the outer shell 101, a valve 103 is provided inside the discharge pipe 102, and a feed pipe 108 penetrating the outer shell 101 is provided inside the inner shell 111;

[0046] A cooling tube 106 is installed inside the annular tube 110, and both ends of the cooling tube 106 pass through the outer shell 101. A temperature sensor 107 located inside the inner shell 111 is provided at the upper end of the outer shell 101;

[0047] The outer wall of the housing 101 is sleeved with a support frame 109 distributed in a ring shape;

[0048] Using the reactor 100;

[0049] Raw materials such as styrene butadiene monomer and propylene monomer, catalysts and other additives are transported to the interior of the reactor 100 through the feed pipe 108. The feed pipe 108 is opened and closed by setting a control valve. The input pipe 104 is connected to the high-temperature steam pipeline. The high-temperature steam is introduced into the cavity. The steam after heat conduction is discharged through the output pipe 105 to achieve heating of the interior of the reactor 100. Both ends of the refrigeration pipe 106 are connected to the refrigerator. The refrigerator transports the cold medium into the refrigeration pipe 106 and diverts it to the annular pipe 110 to cool the reactor 100. The temperature control module is used to adjust the temperature inside the reactor 100. By controlling the reaction temperature, the uniformity of the polymerization reaction can be improved and a higher conversion rate can be achieved under suitable temperature conditions. After the reaction of the styrene butadiene rubber prepolymer, it is output through the discharge pipe 102.

[0050] Example 2

[0051] See also Figure 1-Figure 5 As shown, this embodiment is based on the embodiment 1 and also includes:

[0052] as well as;

[0053] The stirring structure 200 includes a motor 202 fixedly mounted on the upper end of the outer shell 101, a rotating shaft 205 located at the lower end of the motor 202, connecting rods 206 symmetrically distributed on the outer wall of the rotating shaft 205, stirring rods 207 equidistantly distributed on the outer wall of the connecting rods 206, twisted pieces 208 spirally distributed on the outer wall of the rotating shaft 205, a conveying pipe 209 sleeved on the outside of the twisted pieces 208, a motor 1 201 fixedly mounted on both ends of the outer shell 101, and a stirring blade 204 located at the output end of the motor 1 201 and located inside the side of the inner shell 111.

[0054] Support rods 210 are arranged on the lower side of the delivery pipe 209 and are distributed in a circular array and connected to the inner wall of the inner shell 111;

[0055] The inner shell 111 and the outer shell 101 are embedded with bearings 203 at both ends and the upper end. The rotating shaft 205 and the output end of the motor 1 201 are rotatably mounted inside the bearings 203. The stirring blade 204 is sleeved on the outer side of the stirring rod 207.

[0056] Using the stirring structure 200;

[0057] The second motor 202 drives the rotating shaft 205 to rotate, driving the connecting rod 206 to rotate, so that the stirring rod 207 rotates with the connecting rod 206, and the rotating shaft 205 drives the shredder 208 to rotate inside the conveying pipe 209, and the raw materials inside the lower end of the inner shell 111 are twisted and sent to the upper end. It is worth mentioning that after discharging, the shredder 208 needs to idle for a period of time to ensure the discharge of the raw materials inside the conveying pipe 209. The second motor 202 drives the stirring blade 204 to rotate, and the raw materials inside the side of the inner shell 111 are longitudinally stirred. The raw materials on the rotating path of the stirring blade 204 impact each other, which helps the raw materials to mix. The raw materials impact each other during the mixing process, but avoid violent stirring, so it is helpful to carry out the polymerization reaction under milder conditions, which is beneficial to the quality of the product. There will be no dead corners or local uneven mixing of the raw materials in the reactor 100, which enhances the mutual mass transfer and heat transfer process between the reaction materials, thereby improving the efficiency of the reaction and the consistency of the product, thereby improving the product quality.

[0058] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A solvent refining device for condensed styrene-butadiene rubber polymerization, characterized in that: comprising a reaction kettle (100), The reaction kettle (100) comprises an outer shell (101), an inner shell (111) fixedly connected to the inner walls of the upper and lower ends of the outer shell (101), an annular tube (110) distributed in an annular shape on the inner wall of the inner shell (111), an input tube (104) located on the outer wall of the outer shell (101), and an output end; as well as; The stirring structure (200) comprises a second motor (202) fixedly mounted on the upper end of the outer shell (101), a rotating shaft (205) located at the lower end of the second motor (202), connecting rods (206) symmetrically distributed on the outer wall of the rotating shaft (205), stirring rods (207) equidistantly distributed on the outer wall of the connecting rods (206), twisted pieces (208) spirally distributed on the outer wall of the rotating shaft (205), a conveying pipe (209) sleeved on the outside of the twisted pieces (208), a first motor (201) fixedly mounted on both ends of the outer shell (101), and a stirring blade (204) located at the output end of the first motor (201) and located inside the side of the inner shell (111).

2. A solvent refining device for condensed styrene-butadiene rubber polymerization according to claim 1, characterized in that: The outer shell (101) and the inner shell (111) are provided with cavities inside, and the input pipe (104) and the output pipe (105) both pass through the cavities.

3. A solvent refining device for condensed styrene-butadiene rubber polymerization according to claim 1, characterized in that: A discharge pipe (102) penetrating the outer shell (101) is arranged at the lower end of the inner shell (111), a valve (103) is arranged inside the discharge pipe (102), and a feed pipe (108) penetrating the outer shell (101) is arranged inside the inner shell (111).

4. The solvent refining device for polymerization of condensed styrene-butadiene rubber according to claim 1, characterized in that: A refrigeration tube (106) is installed inside the annular tube (110), and both ends of the refrigeration tube (106) pass through the outer shell (101). A temperature sensor (107) located inside the inner shell (111) is provided at the upper end of the outer shell (101).

5. The solvent refining device for polymerization of condensed styrene-butadiene rubber according to claim 1, characterized in that: The outer wall of the housing (101) is sleeved with a support frame (109) distributed in an annular shape.

6. The solvent refining device for condensed styrene-butadiene rubber polymerization according to claim 1, characterized in that: Support rods (210) distributed in a circular array and connected to the inner wall of the inner shell (111) are arranged on the side of the lower end of the delivery pipe (209).

7. The solvent refining device for condensed styrene-butadiene rubber polymerization according to claim 1, characterized in that: Bearings (203) are embedded and installed inside the two ends and the upper end of the inner shell (111) and the outer shell (101), the rotating shaft (205) and the output end of the motor 1 (201) are rotatably installed inside the bearings (203), and the stirring blade (204) is sleeved on the outside of the stirring rod (207).

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