Coagulation kettle for producing ethylene propylene diene monomer

Abstract

The utility model discloses a coagulation kettle for producing ethylene propylene diene monomer, which comprises a coagulation kettle body, a first solution is added in the coagulation kettle body, a stirring device is arranged in the coagulation kettle body, and the stirring device comprises a first stirring paddle; a steam conveying device and a steam spraying device are further arranged in the condensation kettle body, the steam conveying device can convey first steam into the condensation kettle body to generate first bubbles, the first steam makes contact with a first solution to release heat, and the first solution receives the heat and finally boils to generate second bubbles. The first bubbles and the second bubbles float upwards and can absorb impurities in the first solution, and the purpose of impurity removal of the first solution is achieved; the steam spraying device can spray second steam into the condensation kettle body, and the second steam can stir the first solution, so that condensed blocks are removed, the first stirring paddle continuously rotates, the situation that the first stirring paddle is stuck due to condensation of the first solution is avoided, the stirring device is prevented from being damaged, and the accident occurrence probability is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of condensation reactor technology, and more specifically to a condensation reactor for producing ethylene propylene diene monomer (EPDM) rubber. Background Technology

[0002] Rubber is a highly elastic polymer material with reversible deformation. It is elastic at room temperature, capable of significant deformation under small external forces, and returns to its original shape after the force is removed. In rubber preparation, solution polymerization is generally used. In this process, monomers are first dissolved in solvents such as hexane, and an initiator is added to promote the polymerization reaction. As the reaction proceeds, the monomers gradually polymerize into polymer chains, forming a solid rubber. The polymer coagulation process is completed within a rubber coagulation reactor.

[0003] The solution in the coagulation reactor is stirred by a stirring device. If rubber coagulation occurs, the stirring blades will no longer be able to stir the solution, which will damage the device and cause losses.

[0004] Therefore, we propose a coagulation reactor for the production of EPDM rubber. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a coagulation reactor for producing ethylene propylene diene monomer (EPDM) rubber.

[0006] In a first aspect, this application provides a coagulation reactor for producing ethylene propylene diene monomer (EPDM) rubber, comprising:

[0007] The coagulation vessel body contains a first solution, which is a solution containing rubber liquid.

[0008] A stirring device is disposed inside the coagulation vessel body for stirring the first solution, and the stirring device includes a first stirring paddle.

[0009] A steam conveying device is disposed inside the condensation vessel body and below the stirring device. It is used to convey first steam into the condensation vessel body and generate first bubbles. The first steam releases heat when it comes into contact with the first solution, causing the first solution to boil and generate second bubbles. The first bubbles and the second bubbles float to the surface to carry impurities in the first solution away from the first solution.

[0010] A steam injection device is installed on the condensation vessel body and is used to inject second steam into the interior of the condensation vessel body. The second steam is used to agitate the first solution to ensure that the first stirring paddle rotates continuously.

[0011] According to the technical solution provided in the embodiments of this application, the stirring device includes a stirring shaft, which is rotatably disposed inside the body of the coagulation vessel. The stirring shaft extends along a first direction, and its two ends are rotatably connected to the inner wall of the top and the inner wall of the bottom of the body of the coagulation vessel, respectively. The stirring shaft is driven by a driving component to rotate around its axis, and the first stirring paddle is fixedly disposed at the bottom end of the stirring shaft.

[0012] According to the technical solution provided in the embodiments of this application, the stirring device further includes two second stirring blades, both of which are disposed on the stirring shaft and arranged in the first direction, and are both located above the first stirring blade.

[0013] According to the technical solution provided in the embodiments of this application, the stirring device further includes a liquid-spraying plate, which is disposed on the stirring shaft and located above the second stirring paddle, for spraying hot water when rotating with the stirring shaft, thereby forming a water curtain.

[0014] According to the technical solution provided in the embodiments of this application, the steam conveying device includes a steam conveying pipe disposed at the bottom of the condensing vessel body and extending through the bottom of the condensing vessel body into the interior of the condensing vessel body. The steam conveying device also includes a distributor disposed inside the condensing vessel body and located below the first stirring paddle. The distributor is connected to the steam conveying pipe, and the top of the distributor has a plurality of steam outlets.

[0015] According to the technical solution provided in the embodiments of this application, the steam injection device includes a plurality of steam nozzles, all of which are disposed at the bottom of the condensation vessel body and are evenly distributed in the circumferential direction. The steam nozzles extend through the bottom of the condensation vessel body into the interior of the condensation vessel body, and one end of the steam nozzle located inside the condensation vessel body has a nozzle.

[0016] According to the technical solution provided in the embodiments of this application, it also includes multiple baffles, all of which are disposed on the inner wall of the coagulation vessel body and are evenly distributed in the circumferential direction, with the top of the baffles located below the liquid surface of the first solution.

[0017] According to the technical solution provided in the embodiments of this application, the side wall of the condensation vessel body is provided with a material inlet and a material outlet that communicate with the interior of the condensation vessel body.

[0018] According to the technical solution provided in the embodiments of this application, the top of the condensation vessel body is provided with a steam outlet and a manhole that communicate with the interior of the condensation vessel body.

[0019] In summary, this technical solution specifically discloses a coagulation reactor for producing EPDM rubber, comprising a coagulation reactor body containing a first solution, which is a solution containing rubber liquid. The coagulation reactor body is equipped with a stirring device, including a first stirring paddle, to stir the first solution. A steam conveying device is also installed inside the coagulation reactor body, positioned below the stirring device, to deliver first steam into the coagulation reactor body, thereby generating first bubbles. The first steam releases heat upon contact with the first solution, which receives the heat and eventually boils, generating second bubbles. The first and second bubbles rise to the surface, carrying impurities from the first solution, thus achieving the purpose of impurity removal. A steam injection device is also installed inside the coagulation reactor body to inject second steam into the coagulation reactor body. The second steam agitates the first solution, removing any condensed material and ensuring continuous rotation of the first stirring paddle. This assists in the rotation of the first stirring paddle, preventing condensation of the first solution that could cause the first stirring paddle to jam, thus avoiding damage to the stirring device, saving production costs, and reducing the probability of accidents. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a cross-sectional view of a condensing reactor used for producing ethylene propylene diene monomer (EPDM) rubber.

[0022] The following are the labels in the diagram: 1. Condensation vessel body; 2. First stirring paddle; 3. Stirring shaft; 4. Second stirring paddle; 5. Spill plate; 6. Steam conveying pipe; 7. Distributor; 8. Steam nozzle; 9. Baffle; 10. Material inlet; 11. Material outlet; 12. Steam exhaust outlet; 13. Manhole. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example 1

[0026] Please refer to Figure 1The diagram shows a cross-sectional view of a coagulation vessel for producing EPDM rubber. The coagulation vessel for producing EPDM rubber includes a coagulation vessel body 1. The side wall of the coagulation vessel body 1 is provided with a material inlet 10 and a material outlet 11 that communicate with the interior of the coagulation vessel body 1. The material inlet 10 is used to input a first solution into the coagulation vessel body 1, and the material outlet 11 is used to output the first solution after impurity removal. The first solution is a solution containing rubber liquid. The rubber liquid has a low density and therefore will be close to the surface of the first solution.

[0027] The stirring device is used to stir the first solution;

[0028] Specifically, the stirring device includes a stirring shaft 3, which is disposed inside the coagulation vessel body 1 and extends along a first direction. The two ends of the stirring shaft 3 in the first direction are rotatably connected to the top inner wall and the bottom inner wall of the coagulation vessel body 1, respectively. The stirring shaft 3 is driven by a driving component to rotate around its own axis; the first direction is... Figure 1 In the vertical direction;

[0029] Furthermore, the stirring device also includes a first stirring paddle 2, which is fixedly mounted at the bottom end of the stirring shaft 3;

[0030] Furthermore, the stirring device also includes two second stirring paddles 4, both of which are fixedly mounted on the stirring shaft 3 and arranged along the first direction, and are both located above the first stirring paddle 2.

[0031] Therefore, by activating the drive unit, the drive unit can drive the stirring shaft 3 to rotate around its own axis, thereby driving the first stirring paddle 2 and the second stirring paddle 4 to rotate and stir the first solution.

[0032] It should be noted that both the first stirring paddle 2 and the second stirring paddle 4 are located below the surface of the first solution;

[0033] Furthermore, the stirring device also includes a liquid-slinging plate 5, which is fixedly mounted on the stirring shaft 3 and located above the second stirring paddle 4 and above the surface of the first solution. Hot water flows inside the liquid-slinging plate 5, and the rotation of the stirring shaft 3 drives the liquid-slinging plate 5 to rotate, so that the liquid-slinging plate 5 can spray hot water when rotating to form a water curtain. The liquid-slinging plate 5 can refer to the existing patent with publication number CN221156641U, and its purpose is to impact and block the floating rubber liquid through the water curtain to prevent the rubber liquid from escaping.

[0034] A steam conveying device is installed inside the condensing kettle body 1 and is used to convey the first steam into the condensing kettle body 1;

[0035] Specifically, the steam conveying device includes a steam conveying pipe 6, which is disposed at the bottom of the condensing vessel body 1, and its top extends through the bottom of the condensing vessel body 1 and into the interior of the condensing vessel body 1. The bottom of the steam conveying pipe 6 has a first steam inlet for conveying first steam.

[0036] Furthermore, the steam conveying device also includes a distributor 7, which is located inside the condensation vessel body 1 and below the first stirring paddle 2. The distributor 7 is connected to the top of the steam conveying pipe 6, and the top of the distributor 7 has several steam outlets.

[0037] Further, optionally, the distributor 7 has a ring structure, with a steam inlet space inside, and several steam outlets are evenly distributed in a ring direction at the top of the distributor 7;

[0038] Therefore, first steam is supplied to the steam delivery pipe 6 through the first steam inlet. The first steam enters the steam inlet space inside the distributor 7 through the steam delivery pipe 6, and then is discharged into the condensation vessel body 1 through several steam outlets. This ensures uniform contact between the first steam and the first solution. Since the first solution is a liquid and the first steam is a gas, supplying the first steam into the first solution generates the first bubble. Furthermore, the first steam itself carries heat, which is released when it comes into contact with the first solution. The first solution continuously absorbs heat, increasing its own temperature until it boils. Boiling generates the second bubble, and both the first and second bubbles can rise to the surface. Due to the high temperature, the first and second bubbles will not be cooled during the upward movement. Water molecules will continuously evaporate into water vapor on the surface of the first and second bubbles. Furthermore, there is low pressure along the movement path of the first and second bubbles as they rise. Therefore, the first and second bubbles move within the first solution. Low-molecular-weight impurities will move with the first and second bubbles under low pressure and evaporate into gas on the surface of the first and second bubbles, entering the interior of the first and second bubbles. Thus, the first and second bubbles will carry the low-molecular-weight impurities that have evaporated into gas to the surface and eventually leave the first solution, thereby removing impurities from the first solution.

[0039] It should be noted that the impurities are volatile liquids;

[0040] It should be noted that the distributor 7 is located below the first stirring paddle 2. When the first steam is discharged into the body 1 of the condensation vessel through several steam outlets, the first stirring paddle 2 is driven to rotate by the stirring shaft 3. Therefore, the first stirring paddle 2 can impact and disperse the first steam discharged from several steam outlets again, which increases the heat release efficiency of the first steam, ensures that the first steam can be in uniform contact with the first solution, and improves the impurity removal efficiency.

[0041] It should be noted that the top of the condensation vessel body 1 is provided with a steam outlet 12 for discharging gas carrying impurities.

[0042] A steam injection device is installed on the condensation vessel body 1 to inject second steam into the condensation vessel body 1. The second steam is used to drive the first stirring paddle 2 to rotate.

[0043] Specifically, the steam injection device includes four steam nozzles 8, all of which are located at the bottom of the condensation vessel body 1 and are evenly distributed in the circumference. The bottom of the steam nozzle 8 has a second steam inlet, and the top of the steam nozzle 8 extends through the bottom of the condensation vessel body 1 into the interior of the condensation vessel body 1. The top of the steam nozzle 8 has a nozzle.

[0044] Therefore, second steam is supplied to the steam nozzle 8 through the second steam inlet. The second steam is sprayed from the nozzle to the first stirring paddle 2, which can agitate the first solution, thereby removing the condensed material and assisting the first stirring paddle 2 to rotate. This can assist the stirring shaft 3 to rotate, preventing the first solution from condensing inside the coagulation vessel body 1, which would block the rotation of the first stirring paddle 2, and thus prevent the first stirring paddle 2 from jamming and causing damage to the stirring shaft 3.

[0045] It should be noted that injecting the second steam into the first solution will generate a third bubble. The third bubble can also carry low-molecular-weight impurities away from the first solution, thus achieving the purpose of impurity removal.

[0046] It also includes baffles 9, of which there are four. All four baffles 9 are disposed on the inner wall of the coagulation vessel body 1 and are evenly distributed in the circumference. The top of the baffles 9 is below the liquid surface of the first solution.

[0047] Therefore, when the stirring shaft 3 rotates, driving the first stirring paddle 2 and the second stirring paddle 4 to rotate, the first solution is stirred, and a vortex is formed at the liquid surface. By setting the baffle 9 below the liquid surface, the first solution can be disturbed, so that the part below the liquid surface of the first solution cannot form a vortex, while the liquid surface of the first solution can form a vortex. Thus, the vortex generates suction, which draws the rubber liquid near the liquid surface into the first solution to contact with the first vapor, thereby thoroughly removing impurities.

[0048] The top of the condensation vessel body 1 is also provided with a manhole 13 that communicates with the interior of the condensation vessel body 1, so as to facilitate personnel to enter the interior of the condensation vessel body 1 for maintenance and other operations.

[0049] Working principle: A first solution is introduced into the condensation vessel body 1 through the material inlet 10. The driving mechanism rotates the stirring shaft 3 around its own axis, thereby rotating the first stirring paddle 2, the second stirring paddle 4, and the sling plate 5. This stirs the first solution and creates a vortex at the surface, drawing in the rubber liquid near the surface. First steam is then supplied through the first steam inlet to the steam delivery pipe 6. The first steam enters the steam inlet space inside the distributor 7 through the steam delivery pipe 6, and then is discharged into the condensation vessel body 1 through several steam outlets, generating first bubbles. These bubbles contact the rotating first stirring paddle 2 and are broken up by impact, ensuring uniform contact with the first solution. Steam releases heat, the first solution absorbs the heat, and eventually produces a second bubble. The first and second bubbles rise to the surface, and low-molecular-weight impurities volatilize into gas on the surface of the first and second bubbles and are carried by the first and second bubbles. Thus, the first solution can be flushed by the first and second bubbles, and the first and second bubbles can carry away the impurities in the rubber liquid when they come into contact with it. Until the first and second bubbles rise to the surface, the low-molecular-weight impurities volatilized into gas under the action of heat rise. The water curtain formed by the liquid-spinning plate 5 can block the rubber liquid that floats with the impurities, preventing the rubber liquid from escaping. Finally, the impurities and gas are discharged through the steam outlet 12, thereby achieving the removal of impurities from the first solution.

[0050] When the first solution condenses and causes the first stirring paddle 2 to jam, the second steam is injected into the body of the coagulation vessel 1. The second steam agitates the first solution, thereby removing the condensed material and ensuring that the first stirring paddle 2 can continue to rotate. This prevents the first stirring paddle 2 from jamming due to the condensation of the first solution and avoids damage to the stirring device.

[0051] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A coagulation kettle for producing ethylene propylene diene rubber, characterized by, The utility model provides a rubber solution condensing kettle, which comprises: a condensing kettle body (1) with a first solution added inside, the first solution being a solution containing rubber solution; a stirring device arranged inside the condensing kettle body (1) for stirring the first solution, the stirring device comprising a first stirring paddle (2); a steam delivery device arranged inside the condensing kettle body (1) below the stirring device for delivering first steam into the condensing kettle body (1) to generate first bubbles, the first steam being in heat exchange with the first solution to make the first solution boil and generate second bubbles, the first bubbles and the second bubbles floating upwards to carry impurities in the first solution out of the first solution; a steam injection device arranged on the condensing kettle body (1) for injecting second steam into the condensing kettle body (1) to agitate the first solution and ensure continuous rotation of the first stirring paddle (2).

2. The coagulation vessel for producing ethylene-propylene-diene rubber according to claim 1, wherein The stirring device comprises a stirring shaft (3) rotatably arranged inside the condensing kettle body (1) and extending along a first direction, both ends of the stirring shaft (3) being rotatably connected to the inner top wall and the inner bottom wall of the condensing kettle body (1), the stirring shaft (3) being rotatable about its axis by a driving member, and the first stirring paddle (2) being fixedly arranged at the bottom end of the stirring shaft (3).

3. The coagulation vessel for producing ethylene-propylene-diene rubber according to claim 2, wherein The stirring device further comprises two second stirring paddles (4) arranged on the stirring shaft (3) and arranged in the first direction above the first stirring paddle (2).

4. The coagulation vessel for producing ethylene-propylene-diene rubber according to claim 3, wherein The stirring device further comprises a liquid throwing disc (5) arranged on the stirring shaft (3) above the second stirring paddles (4) for spraying hot water to form a water curtain when the stirring shaft (3) rotates.

5. The coagulation kettle for producing ethylene propylene diene rubber according to claim 1, wherein The steam delivery device comprises a steam delivery pipe (6) arranged at the bottom of the condensing kettle body (1) and extending through the bottom of the condensing kettle body (1) into the condensing kettle body (1), and a distributor (7) arranged inside the condensing kettle body (1) below the first stirring paddle (2), the distributor (7) being in communication with the steam delivery pipe (6) and having a plurality of steam outlets at the top thereof.

6. The coagulation vessel for producing ethylene-propylene-diene rubber according to claim 1 or 5, wherein The steam injection device comprises a plurality of steam injection pipes (8) arranged at the bottom of the condensing kettle body (1) and uniformly distributed in the circumferential direction, the steam injection pipes (8) extending through the bottom of the condensing kettle body (1) into the condensing kettle body (1), and the steam injection pipes (8) having injection ports at one end inside the condensing kettle body (1).

7. The coagulation kettle for producing ethylene propylene diene rubber according to claim 1, wherein The utility model further comprises a plurality of baffles (9) arranged on the inner wall of the condensing kettle body (1) and uniformly distributed in the circumferential direction, the baffles (9) having top ends below the liquid level of the first solution.

8. The coagulation kettle for producing ethylene propylene diene rubber according to claim 1, wherein The side wall of the condensation kettle body (1) is provided with a material inlet (10) and a material outlet (11) which are in communication with the inside of the condensation kettle body (1).

9. The coagulation kettle for producing ethylene propylene diene rubber according to claim 1, wherein The top of the condensation kettle body (1) is provided with a steam exhaust port (12) and a manhole (13) which are in communication with the inside of the condensation kettle body (1).

Images