Safety production discharging device of chemical reaction kettle

Abstract

The utility model relates to the technical field of butadiene styrene rubber production, in particular to a safe production discharging device of a chemical reaction kettle. The safe production discharging device of the chemical reaction kettle comprises a polymerization reaction kettle and a premixing tank, the polymerization reaction kettle is connected with a centrifugal machine through an overflow pipeline, the centrifugal machine is connected with a dryer through a pipeline, a feeding port is formed in the polymerization reaction kettle, a semispherical disperser is arranged in the polymerization reaction kettle and located under the feeding port, and the premixing tank is connected with the centrifugal machine through a pipeline. And the premixing tank is connected with the feeding hole through a pipeline. According to the system, additives are premixed through the premixing tank, so that the additives are more uniformly dispersed in a reaction system, the problem of abnormal molecular weight and molecular structure of a polymer caused by non-uniform distribution of the additives such as an initiator is effectively avoided, and the quality of butadiene styrene rubber is improved.

Description

Technical Field

[0001] This utility model relates to the field of styrene-butadiene rubber production technology, specifically to a safe production discharge device for chemical reaction kettles. Background Technology

[0002] In the polymerization process of styrene-butadiene rubber (SBR), numerous issues arise that affect production safety and product quality. Fluctuations in temperature and pressure, as well as inaccurate initiator dosage, can lead to a widening of the polymer's molecular weight distribution and an irregular molecular structure. Too low a molecular weight results in poor rubber strength and abrasion resistance; too high a molecular weight degrades processing performance. Abnormal polymer structures also increase material viscosity, reduce fluidity, and slow the material flow at the discharge port, making it prone to accumulation and even blockage. Furthermore, when poor material fluidity leads to discharge difficulties, increasing the reactor pressure to force discharge can damage the seals of the discharge device, causing material leakage, safety hazards, and environmental pollution.

[0003] The existing discharge devices cannot effectively solve these problems, which seriously affects the production efficiency and quality of styrene-butadiene rubber and also poses a threat to safe production. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a safe discharge device for chemical reactors. By premixing additives in a premixing tank, the additives are more evenly dispersed in the reaction system, effectively avoiding abnormal polymer molecular weight and structure caused by uneven distribution of initiators and other additives, thus improving the quality of styrene-butadiene rubber. Furthermore, the use of an obtuse-angle discharge port with an insulated buffer tank and insulation measures prevents the viscosity of the material from increasing due to temperature changes, ensuring smooth entry of the material into the centrifuge, solving the problem of discharge port blockage, and improving discharge efficiency.

[0005] This utility model is achieved using the following technical solution:

[0006] The aforementioned chemical reactor safety production discharge device includes a polymerization reactor and a premix tank. The polymerization reactor is connected to a dryer via a centrifuge. The polymerization reactor is equipped with a feed inlet. The premix tank is connected to the feed inlet via a pipeline. A buffer tank is provided between the polymerization reactor and the centrifuge.

[0007] The reactor is equipped with an internal stirring paddle driven by a motor to ensure thorough mixing of the reactants. An insulation jacket surrounds the reactor to effectively maintain the required reaction temperature and minimize heat loss. Additionally, a perforated dispersion disc is located inside the reactor. A recovery device is also installed between the centrifuge and the dryer.

[0008] The polymerization reactor is equipped with an internal stirring paddle driven by a drive motor, and an external insulation sleeve is provided on the outside of the polymerization reactor.

[0009] The polymerization reactor is equipped with a perforated dispersion plate inside, and the perforated dispersion plate is connected to the reactor feed pipe.

[0010] The premixing tank is equipped with a stirring paddle inside and a heat insulation sleeve on the outside. An additive inlet pipe is connected to the premixing tank.

[0011] The premixing tank is equipped with an internal stirring paddle to premix the incoming initiators, activators, regulators, and other additives, along with a portion of the diluent, ensuring uniform dispersion of the additives in the reaction system. The premixing tank is also equipped with an insulation jacket to maintain temperature stability during the premixing process. An additive inlet pipe is connected to the premixing tank.

[0012] A transfer pump is provided between the buffer tank and the centrifuge, an outlet pipe is provided between the transfer pump and the buffer tank, an inlet pipe is provided between the transfer pump and the centrifuge, and an inlet pipe is provided between the centrifuge and the dryer.

[0013] After the polymerization reaction is complete, the reaction products are temporarily stored in a buffer tank. Due to the continuity of the reaction process and the limited processing capacity of the centrifuge, the buffer tank can regulate the flow rate of the material entering the centrifuge, preventing the material discharged from the reactor from directly impacting the centrifuge and ensuring the stable operation of the centrifuge. Furthermore, pressure fluctuations may occur when the polymerization reactor discharges material; the buffer tank can mitigate these fluctuations, preventing pressure instability from damaging downstream equipment (such as the centrifuge) and ensuring the safe and stable operation of the entire discharge system.

[0014] The dryer is connected to a high-temperature nitrogen inlet pipe. The dryer is connected to the premixed tank insulation sleeve through a heat exchanger. A heating pipe is provided between the heat exchanger and the premixed tank insulation sleeve. A condensate collection tank is connected to the heat exchanger.

[0015] The buffer tank is equipped with an insulation sleeve on its outer side. An obtuse-angle discharge port is located below the polymerization reactor, and an obtuse-angle discharge port insulation sleeve is also provided on its outer side. The heating pipe is connected to the obtuse-angle discharge port insulation sleeve via a connecting pipe. The obtuse-angle discharge port insulation sleeve is used for heat preservation during discharge, especially in winter when there is a large temperature difference between the inside and outside.

[0016] The working principle of this utility model is as follows:

[0017] Before the polymerization of styrene-butadiene rubber (SBR), initiators, activators, regulators, and other additives are premixed with a portion of the diluent in a premixing tank. The agitator in the premixing tank ensures the additives are evenly dispersed in the diluent. After premixing, the solid-liquid mixture enters the reactor through the inlet. A drive motor activates the reactor's agitator, and butadiene and styrene enter the reactor through their respective feed pipes to begin the polymerization reaction. During the reaction, an insulation jacket maintains a stable reaction temperature. After the reaction, the reaction products enter a discharge buffer tank through a pipeline. The insulation jacket of the discharge buffer tank maintains the material temperature to prevent an increase in viscosity. The material is then pumped into a centrifuge for further processing. The centrifuged material then enters a dryer for drying. The hot air in the dryer exchanges heat at a heat exchanger and then enters a condensate collection tank. The heated liquid phase in the heat exchanger is used for temperature control in the premixing tank.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This utility model of a safe production discharge device for chemical reactors utilizes a premixing tank to premix additives, ensuring more uniform dispersion of the additives in the reaction system. This effectively avoids abnormal polymer molecular weight and structure caused by uneven distribution of initiators and other additives, thus improving the quality of styrene-butadiene rubber. The use of an obtuse-angle discharge port insulation sleeve and a discharge buffer tank, along with insulation measures, prevents viscosity increases due to temperature changes, ensuring smooth entry of the material into the centrifuge, solving the discharge port blockage problem, and improving discharge efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the safe production discharge device for the chemical reactor of this utility model;

[0021] In the diagram: 1. Polymerization reactor; 2. Premix tank; 3. Centrifuge; 4. Dryer; 5. Drive motor; 6. Polymerization reactor agitator; 7. Reactor feed pipe; 8. Perforated dispersion disc; 9. Feed inlet; 11. Polymerization reactor insulation sleeve; 12. Premix tank insulation sleeve; 13. Premix tank agitator; 14. Additive inlet pipe; 15. Buffer tank; 16. Transfer pump; 17. Buffer tank insulation sleeve; 18. Connecting pipe; 19. Centrifuge inlet pipe; 20. High-temperature nitrogen inlet pipe; 21. Heating pipe; 22. Buffer tank outlet pipe; 23. Dryer inlet pipe; 24. Heat exchanger; 25. Condensate collection tank; 26. Obtuse-angle outlet insulation sleeve. Detailed Implementation

[0022] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1 As shown, the chemical reactor safety production discharge device includes a polymerization reactor 1 and a premixing tank 2. The polymerization reactor 1 is connected to a dryer 4 via a centrifuge 3. The polymerization reactor 1 is equipped with a feed inlet 9. The premixing tank 2 is connected to the feed inlet 9 via a pipe. A buffer tank 15 is provided between the polymerization reactor 1 and the centrifuge 3. A recovery device is also provided between the centrifuge 3 and the dryer 4 for the recovery of diluent. The polymerization reactor 1 is equipped with a polymerization reactor agitator 6 driven by a drive motor 5 inside, and a polymerization reactor insulation sleeve 11 is provided on the outside of the polymerization reactor 1. The polymerization reactor 1 is equipped with a perforated dispersion plate 8 inside, and a reactor feed pipe 7 is connected to the perforated dispersion plate 8. The premixing tank 2 is equipped with a premixing tank agitator 13 inside, and a premixing tank insulation sleeve 12 is provided on the outside of the premixing tank 2. An auxiliary agent inlet pipe 14 is connected to the premixing tank 2. A transfer pump 16 is provided between the buffer tank 15 and the centrifuge 3. A buffer tank outlet pipe 22 is provided between the transfer pump 16 and the buffer tank 15. A centrifuge inlet pipe 19 is provided between the transfer pump 16 and the centrifuge 3. A dryer inlet pipe 23 connects the centrifuge 3 and the dryer 4. A high-temperature nitrogen inlet pipe 20 is connected to the dryer 4. The dryer 4 is connected to the premix tank insulation sleeve 12 via a heat exchanger 24. A heating pipe 21 is provided between the heat exchanger 24 and the premix tank insulation sleeve 12. A condensate collection tank 25 is connected to the heat exchanger 24. A buffer tank insulation sleeve 17 is provided on the outside of the buffer tank 15. An obtuse-angle outlet is provided below the polymerization reactor 1. An obtuse-angle outlet insulation sleeve 26 is provided on the outside of the obtuse-angle outlet. The heating pipe 21 is connected to the obtuse-angle outlet insulation sleeve 26 via a connecting pipe 18.

[0025] The above-mentioned safe production discharge device for chemical reactors includes the following steps during operation:

[0026] (1) The initiator, activator, regulator and other auxiliary agents are premixed with a portion of the diluent in the premix tank 2. The agitator 13 of the premix tank is working to make the auxiliary agents evenly dispersed in the diluent. After the premixing is completed, the solid-liquid mixture enters the polymerization reactor 1 through the feed port 9. The drive motor 5 drives the agitator 6 of the polymerization reactor to work. Butadiene and styrene enter the polymerization reactor 1 through their respective feed pipes to start the polymerization reaction. During the reaction, the insulation jacket 11 of the polymerization reactor maintains the reaction temperature. (2) The reaction product is discharged to the buffer tank through the obtuse angle discharge port. In step 15, the insulation sleeve of the buffer tank 15 maintains the material temperature to prevent the material viscosity from increasing. Then, the material is pumped by the conveying pump 16 and enters the centrifuge 3 through the buffer tank outlet pipe 22 for processing. After centrifugation, the material enters the dryer 4 through the centrifuge inlet pipe 19 for drying. The dryer 4 is connected to the high-temperature nitrogen inlet pipe 20. The hot air in the dryer 4 exchanges heat at the heat exchanger 24 and then enters the condensate collection tank 25. The heated liquid phase in the heat exchanger 24 is used for temperature control of the premix tank 2 and heating of the obtuse angle outlet insulation sleeve 26 through the heating pipe 21.

Claims

1. A safe production discharge device for a chemical reaction vessel, characterized in that, It includes a polymerization reactor (1) and a premix tank (2). The polymerization reactor (1) is connected to a dryer (4) via a centrifuge (3). The polymerization reactor (1) is provided with a feed inlet (9). The premix tank (2) is connected to the feed inlet (9) via a pipe. A buffer tank (15) is provided between the polymerization reactor (1) and the centrifuge (3).

2. The safe production discharge device for a chemical reactor according to claim 1, characterized in that, The polymerization reactor (1) is equipped with a polymerization reactor stirring paddle (6) driven by a drive motor (5) inside, and a polymerization reactor insulation sleeve (11) is provided on the outside of the polymerization reactor (1).

3. The safe production discharge device for a chemical reactor according to claim 1, characterized in that, The polymerization reactor (1) is equipped with a perforated dispersion plate (8) inside, and the reactor feed pipe (7) is connected to the perforated dispersion plate (8).

4. The safe production discharge device for a chemical reactor according to claim 1, characterized in that, The premixing tank (2) is equipped with a premixing tank stirring paddle (13) inside, and a premixing tank insulation sleeve (12) is provided on the outside of the premixing tank (2). An auxiliary agent inlet pipe (14) is connected to the premixing tank (2).

5. The safe production discharge device for a chemical reactor according to claim 1, characterized in that, A transfer pump (16) is provided between the buffer tank (15) and the centrifuge (3), a buffer tank outlet pipe (22) is provided between the transfer pump (16) and the buffer tank (15), a centrifuge inlet pipe (19) is provided between the transfer pump (16) and the centrifuge (3), and a dryer inlet pipe (23) is connected between the centrifuge (3) and the dryer (4).

6. The safe production discharge device for a chemical reactor according to claim 4, characterized in that, The dryer (4) is connected to a high-temperature nitrogen inlet pipe (20). The dryer (4) is connected to the premix tank insulation sleeve (12) through a heat exchanger (24). A heating pipe (21) is provided between the heat exchanger (24) and the premix tank insulation sleeve (12). A condensate collection tank (25) is connected to the heat exchanger (24).

7. The safe production discharge device for a chemical reactor according to claim 6, characterized in that, The buffer tank (15) is provided with a buffer tank insulation sleeve (17) on the outside. The polymerization reactor (1) is provided with an obtuse angle discharge port below. An obtuse angle discharge port insulation sleeve (26) is provided on the outside of the obtuse angle discharge port. The heating pipe (21) is connected to the obtuse angle discharge port insulation sleeve (26) through a connecting pipe (18).

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