Accurate temperature control polymerization reaction kettle

Abstract

The utility model relates to a polymerization reaction kettle capable of accurately controlling temperature, and belongs to the field of polymerization reaction equipment. The polymerization reaction kettle capable of accurately controlling the temperature is characterized by comprising a polymerization kettle body, a temperature control jacket and a temperature control coil pipe, the polymerization kettle body is provided with a full-section thermometer group, the temperature control jacket wraps the outer side of the polymerization kettle body, and the temperature control coil pipe enters the polymerization kettle body from the top of the polymerization kettle body and is spirally arranged downwards along the inner wall of the polymerization kettle body to form an upward spiral with smaller radius after reaching the inner bottom of the polymerization kettle body. And leaving from the top of the polymerizer body. According to the utility model, the structure of the cooling equipment is improved, and the whole-section temperature control is added, so that the temperature in the kettle is accurately controlled. By arranging multiple thermometers, the input quantity of the coolant can be corrected in time, and the temperature difference in the kettle is controlled to be less than or equal to + / -1 DEG C.

Description

Technical Field

[0001] The utility model relates to a polymerization reactor with precise temperature control, belonging to the field of polymerization reaction equipment. Background Art

[0002] Polymerization reaction is a chemical reaction and belongs to a major hazardous process, which is a process of converting low-molecular-weight monomers into high-molecular-weight polymers. The initiators added in the polymerization reaction are all peroxides with very strong chemical activity. Once the ingredient ratio and temperature control are improper, it is easy to cause explosive polymerization. In addition, the polymer has a high molecular weight and high viscosity, and the heat released by the polymerization reaction is not easy to be exported. Once the temperature control is improper during the reaction process, it is extremely easy to cause local overheating or runaway temperature of the reactor, which is likely to lead to explosion accidents.

[0003] From the feeding ratio to the product output in the polymerization reaction, it takes more than twenty hours, and precise temperature control is required. Operating multiple heat sources and coolants is needed to control the temperature. Manual monitoring requires a large number of personnel and a lot of energy. Each internal operator in the original latex device can monitor at most 2 polymerization reactors, manually adjusting the opening of the pneumatic control valve depending on the temperature change or relying on PID to control part of the coolant control valve. Moreover, it is very difficult to ensure that the temperature difference ≤ ±1°C by manual control, which brings great uncertainties in terms of production safety and product quality. Summary of the Invention

[0004] According to the problems described in the background, the problem to be solved by the utility model is:

[0005] How to achieve precise control of the temperature of the polymerization reaction.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] A polymerization reactor with precise temperature control, characterized in that it includes a polymerization reactor body, a temperature control jacket and a temperature control coil; the polymerization reactor body is provided with a full-section thermometer group, the temperature control jacket is wrapped outside the polymerization reactor body, the temperature control coil enters the inside of the polymerization reactor body from the top of the polymerization reactor body and is arranged spirally downward along the inner wall of the polymerization reactor body. After reaching the bottom of the polymerization reactor body, it forms a spiral with a smaller radius and an upward direction and leaves from the top of the polymerization reactor body; the temperature control jacket is provided with a jacket inlet and a jacket outlet, the jacket inlet is connected to the -4°C cooling water supply, hot water supply and circulating water supply, and the jacket outlet is connected to the -4°C cooling water return, hot water return and circulating water return; the jacket inlet is provided with a jacket inlet thermometer, the jacket outlet is provided with a jacket outlet thermometer, and at the places where the coil enters and leaves the polymerization reactor body, a coolant inlet thermometer and a coolant outlet thermometer are respectively provided; the -4°C cooling water supply and the circulating water supply are respectively provided with a cooling water control valve and a circulating water control valve, and a coolant control valve is provided on the temperature control coil in front of the coolant inlet thermometer.

[0008] Preferably, the refrigerant flowing in the temperature control coil is -10°C cooling water.

[0009] Preferably, the jacket inlet thermometer, jacket outlet thermometer, refrigerant inlet thermometer, refrigerant outlet thermometer, cooling water control valve, circulating water control valve, and refrigerant control valve are all electrically connected through the DCS operating system.

[0010] Preferably, the full-section thermometer group is composed of three thermometers, and the thermometer probes are distributed in the upper, middle, and lower sections of the polymerization kettle body respectively.

[0011] The coil adopts a double-helix structure to evenly cool the inside of the reaction kettle as much as possible, prevent local overheating, ensure that each thermometer can reflect the true temperature inside the kettle, and lay a foundation for precise temperature control. By taking the average value of multiple thermometers in the full-section thermometer group, the temperature inside the kettle is obtained. Through the DCS control system, according to the reaction temperature change curve, the interlock control of the thermometer and the control valve is set, and the temperature difference inside the kettle can be controlled within ≤±1°C.

[0012] The beneficial effects of the present utility model are:

[0013] By improving the structure of the cooling equipment and adding full-section temperature control, the present utility model ensures the precise control of the temperature inside the kettle.

[0014] By setting multiple thermometers at multiple places, the present utility model can correct the input amount of the coolant in time and ensure that the temperature difference inside the kettle is controlled within ≤±1°C. Description of the Drawings

[0015] Figure 1 Schematic diagram of the present utility model

[0016] In the figure: 1 is the polymerization kettle body; 2 is the temperature control jacket; 21 is the jacket inlet thermometer; 22 is the jacket outlet thermometer; 3 is the temperature control coil; 31 is the refrigerant inlet thermometer; 32 is the refrigerant outlet thermometer; 33 is the refrigerant control valve; 4 is the -4°C cooling water supply; 41 is the -4°C cooling water return; 42 is the cooling water control valve; 5 is the hot water supply; 51 is the hot water return; 6 is the circulating water supply; 61 is the circulating water return; 62 is the circulating water control valve; 7 is the full-section thermometer group. Detailed Embodiments

[0017] Embodiment 1

[0018] A polymerization reactor with precise temperature control, characterized in that it includes a polymerization reactor body 1, a temperature control jacket 2 and a temperature control coil 3; the polymerization reactor body 1 is provided with a full-section thermometer group 7, the temperature control jacket 2 is wrapped outside the polymerization reactor body 1, and the temperature control coil 3 enters the inside of the polymerization reactor body 1 from the top of the polymerization reactor body 1 and is arranged spirally downward along the inner wall of the polymerization reactor body 1. After reaching the bottom of the polymerization reactor body 1, it forms a spiral with a smaller radius and an upward direction and leaves from the top of the polymerization reactor body 1; the temperature control jacket 2 is provided with a jacket inlet and a jacket outlet, the jacket inlet is connected to -4°C cooling water supply 4, hot water supply 5 and circulating water supply 6, and the jacket outlet is connected to -4°C cooling water return 41, hot water return 51 and circulating water return 61; the jacket inlet is provided with a jacket inlet thermometer 21, the jacket outlet is provided with a jacket outlet thermometer 22, and a refrigerant inlet thermometer 31 and a refrigerant outlet thermometer 32 are respectively provided at the places where the coil enters and leaves the polymerization reactor body 1; the -4°C cooling water supply 4 and the circulating water supply 6 are respectively provided with a cooling water control valve 42 and a circulating water control valve 62, and a refrigerant control valve 33 is provided on the temperature control coil 3 in front of the refrigerant inlet thermometer 31;

[0019] The refrigerant flowing in the temperature control coil 3 is -10°C cooling water.

[0020] The jacket inlet thermometer 21, the jacket outlet thermometer 22, the refrigerant inlet thermometer 31, the refrigerant outlet thermometer 32, the cooling water control valve 42, the circulating water control valve 62 and the refrigerant control valve 33 are all electrically connected through a DCS operating system.

[0021] The full-section thermometer group 7 is composed of three thermometers, and the thermometer probes are respectively distributed in the upper, middle and lower sections of the polymerization reactor body.

[0022] The utility model improves the structure of the cooling equipment and increases the full-section temperature control, ensuring the precise control of the temperature in the kettle.

[0023] By setting multiple thermometers, the utility model can correct the input amount of the coolant in time and ensure that the temperature difference in the kettle is controlled within ≤±1°C.

Claims

1. A polymerization reactor with precise temperature control, characterized in that, It includes a polymerization kettle body (1), a temperature control jacket (2) and a temperature control coil (3); the polymerization kettle body (1) is provided with a full-section thermometer group (7), the temperature control jacket (2) is wrapped outside the polymerization kettle body (1), and the temperature control coil (3) enters the inside of the polymerization kettle body (1) from the top of the polymerization kettle body (1) and is arranged spirally downward along the inner wall of the polymerization kettle body (1). After reaching the bottom of the polymerization kettle body (1), it forms a spiral with a smaller radius and an upward direction and leaves from the top of the polymerization kettle body (1); the temperature control jacket (2) is provided with a jacket inlet and a jacket outlet. The jacket inlet is connected to the -4°C cooling water supply (4), the hot water supply (5) and the circulating water supply (6), and the jacket outlet is connected to the -4°C cooling water return (41), the hot water return (51) and the circulating water return (61); the jacket inlet is provided with a jacket inlet thermometer (21), the jacket outlet is provided with a jacket outlet thermometer (22), and at the places where the coil enters and leaves the polymerization kettle body (1), a refrigerant inlet thermometer (31) and a refrigerant outlet thermometer (32) are respectively provided; the -4°C cooling water supply (4) and the circulating water supply (6) are respectively provided with a cooling water control valve (42) and a circulating water control valve (62), and a refrigerant control valve (33) is provided on the temperature control coil (3) before the refrigerant inlet thermometer (31).

2. The precision temperature-controlled polymerization reactor according to claim 1, wherein The refrigerant flowing in the temperature control coil (3) is -10°C cooling water.

3. The polymerization reactor with precise temperature control according to claim 1, characterized in that, The jacket inlet thermometer (21), the jacket outlet thermometer (22), the refrigerant inlet thermometer (31), the refrigerant outlet thermometer (32), the cooling water control valve (42), the circulating water control valve (62) and the refrigerant control valve (33) are all electrically connected through a DCS operating system.

4. The precision temperature-controlled polymerization reactor according to claim 1, wherein, The full-section thermometer group (7) is composed of three thermometers, and the thermometer probes are distributed in the upper, middle and lower sections of the polymerization kettle body respectively.

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