A reaction kettle temperature control device and a reaction kettle

Abstract

The application discloses a kind of reaction kettle temperature control device and reaction kettle, kettle body is equipped with jacket, feed pipe, discharge pipe, kettle body is provided with cooling pool, first pipeline, second pipeline outside, cooling pool is provided with cold liquid outlet and cold liquid outlet, cooling pool is provided with multiple cooling cylinders, cooling cylinder is vertically spaced apart between, cooling cylinder is closed chamber, stirring paddle is all provided in cooling cylinder, the upper portion of cooling cylinder is connected discharge pipe by first pipeline, the lower portion of cooling cylinder is connected the feed pipe of kettle body by second pipeline, pump body and first valve are provided on first pipeline, first valve is close to discharge pipe compared with pump body.The application replaces reaction kettle jacket or coil by using different pipeline to control cold and hot medium to replace, avoids the leakage problem caused by large temperature difference of equipment, improves safety and fast temperature control ability.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, and in particular to a temperature control device for a reaction vessel and a reaction vessel. Background Technology

[0002] Jacketed reactors, as chemical reaction vessels, achieve heat transfer to the reactor body by circulating heat transfer oil, water, etc. into the jacket. When the reactor temperature exceeds the set reaction temperature, it is necessary to switch the high-temperature medium to the cooling medium for cooling. However, the jacketed structure means that the cooling medium must be mixed with the hot medium before cooling can be achieved. At this time, the temperature of the cooling medium has already risen, and the temperature difference between the cooling medium and the reactor body has decreased, resulting in a weakened cooling effect on the reactor body. At the same time, the direct switching between hot and cold media will lead to a large temperature difference in the equipment, which can easily cause equipment leakage and lower safety. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a temperature control device and reactor for a reactor that avoids the exchange of hot and cold media within the jacket.

[0004] The objective of this invention is achieved through the following technical solution: a reaction vessel temperature control device and a reaction vessel, comprising a vessel body with a jacket, an inlet pipe and an outlet pipe provided on the vessel body, a cooling pool, a first pipeline and a second pipeline provided outside the vessel body, a cold liquid outlet and a cold liquid outlet provided on the cooling pool, a plurality of cooling cylinders provided inside the cooling pool, the cooling cylinders being vertically spaced apart, each cooling cylinder being a sealed chamber, each cooling cylinder being provided with a stirring paddle, the upper part of each cooling cylinder being connected to the outlet pipe through the first pipeline, the lower part of each cooling cylinder being connected to the inlet pipe of the vessel body through the second pipeline, a pump body and a first valve being provided on the first pipeline, the first valve being closer to the outlet pipe than the pump body.

[0005] Preferably, a heat dissipation pipe is provided outside the vessel body, one end of the heat dissipation pipe is connected to the first pipeline, the other end of the heat dissipation pipe is connected to the feed pipe, a second valve is provided at the inlet end of the heat dissipation pipe, a third valve is provided on the first pipeline, and the second valve and the third valve are respectively connected to the outlet of the pump body.

[0006] Preferably, the height of the liquid inlet pipe of the vessel body is lower than that of the heat dissipation pipe and the cooling pool, a fourth valve is provided on the third pipe, and a fifth valve is provided between the liquid outlet of the heat dissipation pipe and the feed pipe.

[0007] Preferably, the heat dissipation pipe is serpentine, coiling upwards from the bottom.

[0008] Preferably, the material of the inner surface of the cooling cylinder is the same as the material of the inner surface of the vessel.

[0009] Preferably, the diameter of the cooling cylinder is smaller than the radius of the vessel body.

[0010] This invention has the following advantages: By installing a cooling cylinder and cooling pool outside the jacketed or coiled reactor, the material inside the reactor is cooled. Combined with the control of the flow rate of the heating medium in the jacket or coil, it achieves both heating and cooling of the material in the reactor. Compared to directly switching between hot and cold media for temperature control, this avoids equipment leakage problems caused by medium switching, resulting in faster and better cooling. Furthermore, the cooling process involves partial material transfer, preventing excessive material buildup in the reactor and thus improving equipment safety. The stirring paddle inside the cooling cylinder changes the material flow from laminar to turbulent, accelerating heat exchange. The installed heat dissipation pipes enable air cooling. The heat dissipation pipes and cooling pool are positioned higher than the feed pipe of the reactor body, facilitating direct material entry into the reactor body under gravity and reducing residual material in the cooling device. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention.

[0012] In the diagram, 1. vessel body; 2. jacket; 3. discharge pipe; 4. feed pipe; 5. cooling pool; 6. cold liquid inlet; 7. cold liquid outlet; 8. cooling cylinder; 9. stirring paddle; 10. first pipeline; 11. first valve; 12. pump body; 13. second pipeline; 14. second valve; 15. heat dissipation pipe; 16. third valve; 17. fourth valve; 18. fifth valve. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0014] Example 1, such as Figure 1As shown, a temperature control device and a reaction vessel are disclosed. The vessel body 1 is equipped with a jacket 2. A feed pipe 4 is installed at the upper part of the vessel body 1, and a discharge pipe 3 is installed at the lower part of the vessel body 1. High-temperature heat transfer oil heated by a heat transfer oil boiler flows into the jacket 2. A cooling device is installed outside the vessel body 1, comprising a cooling pool 5, a first pipe 10, a second pipe 13, and a heat dissipation pipe 15. The height of the heat dissipation pipe 15 and the cooling pool 5 is higher than the height of the feed pipe 4 of the vessel body 1. A cold liquid inlet 6 and a cold liquid outlet 7 are provided on the cooling pool 5. The cold liquid inlet 7 is located below the cooling pool 5, and the cold liquid outlet 7 is located above the cooling pool 5. Six cooling cylinders 8 are installed inside the cooling pool 5, vertically spaced apart. The cooling cylinders 8 are fixed inside the cooling pool 5 by supports. Both the vessel body 1 and the cooling cylinders 8 are enamel-lined reaction vessels. The radius of each cooling cylinder 8 is one-sixth of the radius of the vessel body 1. Each cooling cylinder 8 contains... A vertically installed stirring paddle 9 is connected to the upper part of the cooling cylinder 8 via a first pipe 10 to the discharge pipe 3. The discharge port at the lower part of the cooling cylinder 8 passes through the bottom of the cooling pool 5 and is connected to the feed pipe 4 of the vessel body 1 via a second pipe 13. A pump body 12, a first valve 11, and a third valve 16 are installed on the first pipe 10. The pump body 12 is a centrifugal pump. The first valve 11 is closer to the discharge pipe 3 than the pump body 12. The heat dissipation pipe 15 has a serpentine coil structure. The inlet of the heat dissipation pipe 15 is connected to the first pipe 10, and the outlet of the heat dissipation pipe 15 is connected to the feed pipe 4. A second valve 14 is installed at the inlet end of the heat dissipation pipe 15, and a fifth valve 18 is installed at the outlet end of the heat dissipation pipe 15. The second valve 14 and the third valve 16 are respectively connected to the outlet end of the pump body 12. The first valve 11, the second valve 14, the third valve 16, the fourth valve 17, and the fifth valve 18 are all electromagnetic control valves.

[0015] In Example 2, the vessel body 1 is an external coil reactor. A feed pipe 4 is installed at the upper part of the vessel body 1, and a discharge pipe 3 is installed at the lower part of the vessel body 1. High-temperature heat transfer oil heated by a heat transfer oil boiler is introduced into the coil. A cooling device is installed on the outside of the vessel body 1. The cooling device includes a cooling pool 5, a first pipeline 10, a second pipeline 13, six cooling cylinders 8, a pump body 12, a first valve 11, and a fourth valve 17. The position of the cooling pool 5 is higher than the feed inlet of the vessel body 1. An agitator 9 is installed inside the cooling cylinders 8. The pump body 12 and the first valve 11 are installed on the first pipeline 10, and the fourth valve 17 is installed on the second pipeline 13. The feed inlet of the cooling cylinders 8 is connected to the discharge outlet of the vessel body 1 through the first pipeline 10, and the discharge outlet of the cooling cylinders 8 is connected to the feed pipe 4 of the vessel body 1 through the second pipeline 13.

[0016] The operating steps and principle of this invention are as follows: High-temperature heat transfer oil or water is circulated through the jacket or coil inside the vessel body 1 to heat the vessel body. When the material temperature inside the vessel body is too high, the flow rate of heat transfer oil or water to the jacket or coil is reduced or completely shut off, and an external cooling device is used to cool the material. The first pipeline, heat dissipation pipe, and vessel body constitute the first circulation pipeline. By discharging the material inside the vessel body to the outside of the vessel body, heat dissipation and cooling are achieved. This is the air cooling process. During the air cooling process, the material needs to circulate continuously in the first circulation pipeline until the temperature returns to the set range. The first pipeline, cooling pool, cooling cylinder, second pipeline, and vessel body constitute the second circulation pipeline. When the temperature inside the vessel body is too high and the temperature in the cooling pool is low, i.e., the temperature difference between the two is large, the hottest material at the bottom of the vessel body is discharged into the cooling cylinder through the second circulation pipeline for cooling. When the material in the cooling cylinder reaches the set minimum temperature, the fourth valve is opened to discharge all the material in the cooling cylinder into the vessel body. The stirring device installed inside the vessel body dissipates the hot and cold materials. The materials are rapidly and evenly mixed to reach the optimal set temperature; this is the intermittent water cooling process. When the temperature in the cooling tank is high, i.e., the temperature difference between the material and the cooling water is small, the fourth valve is kept open during the cooling process. The material in the vessel is continuously cooled through the cooling cylinder and returned to the vessel; this is the continuous water cooling process. Through air cooling, intermittent water cooling, and continuous water cooling, different cooling schemes are adapted to materials with different temperatures, resulting in better temperature control. All three cooling processes separate the heating medium and the cooling medium, avoiding direct switching of the cooling medium into the jacket or coil, effectively preventing leakage problems caused by large temperature differences in the equipment. In case of boiling over due to excessive material input, the cooling cylinder also plays a role in transferring some material to prevent boiling over, enhancing the safety of the equipment. The cooling cylinder is a long and narrow reaction vessel, which, compared to shell and tube heat exchangers, can adapt to various materials, including those undergoing chemical reactions, and is also more convenient for maintenance.

[0017] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A temperature control device for a reaction vessel, comprising a vessel body (1) with a jacket (2), wherein a feed pipe (4) and a discharge pipe (3) are provided on the vessel body (1), characterized in that: The vessel body (1) is provided with a cooling pool (5), a first pipeline (10), and a second pipeline (13). The cooling pool (5) is provided with a cold liquid inlet (6) and a cold liquid outlet (7). The cooling pool (5) is provided with multiple cooling cylinders (8), which are vertically spaced apart. Each cooling cylinder (8) is a closed chamber. Each cooling cylinder (8) is provided with a stirring paddle (9). The upper part of the cooling cylinder (8) is connected to the discharge pipe (3) through the first pipeline (10), and the lower part of the cooling cylinder (8) is connected to the feed pipe (4) of the vessel body (1) through the second pipeline (13). The first pipeline (10) is provided with a pump body (12) and a first valve (11). The first valve (11) is closer to the discharge pipe (3) than the pump body (12). The vessel body (1) is provided with a heat dissipation pipe (15), one end of which is connected to... The first pipeline (10) is connected to the first end of the heat dissipation pipe (15), and the other end of the heat dissipation pipe (15) is connected to the feed pipe (4). A second valve (14) is provided at the inlet end of the heat dissipation pipe (15). A third valve (16) is provided on the first pipeline (10). The second valve (14) and the third valve (16) are respectively connected to the outlet of the pump body (12). The height of the feed pipe (4) of the vessel body (1) is lower than that of the heat dissipation pipe (15) and the cooling pool (5). A fourth valve (17) is provided on the second pipeline (13). A fifth valve (18) is provided between the liquid outlet of the heat dissipation pipe (15) and the feed pipe (4). The end of the pump body (12) closest to the first valve (11) is the inlet of the pump body (12). The connection between the heat dissipation pipe (15) and the first pipeline (10) is located between the pump body (12) and the third valve (16).

2. The reaction vessel temperature control device according to claim 1, characterized in that: The heat dissipation pipe (15) is serpentine, coiling upwards from the bottom.

3. The reaction vessel temperature control device according to claim 1, characterized in that: The material of the inner surface of the cooling cylinder (8) is the same as the material of the inner surface of the vessel body (1).

4. The reaction vessel temperature control device according to claim 1, characterized in that: The diameter of the cooling cylinder (8) is smaller than the radius of the vessel body (1).

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