Dicumyl peroxide separation system

Abstract

The utility model relates to the technical field of dicumyl peroxide production, in particular to a dicumyl peroxide separation system. The dicumyl peroxide separation system comprises a reaction kettle and a premixing kettle, the reaction kettle is connected with a first-stage cooling tank through a reaction kettle outlet pipeline, the first-stage cooling tank is connected with a distillation tower through a filter, the distillation tower is connected with a drying box through a recrystallization kettle, a feeding port is formed in the reaction kettle, a hemispherical disperser is arranged in the reaction kettle, and the premixing kettle is connected with the drying box through a filter. The hemispherical disperser is positioned right below the feeding hole; and the premixing kettle is connected with the feeding hole through a pipeline. According to the system, through the arrangement of the premixing kettle, all liquid-phase raw materials are premixed in the premixing kettle, and the high-temperature gas phase in the heating pipeline is used for preheating the liquid-phase raw materials, so that the production efficiency and the energy utilization rate are greatly improved while the dispersion uniformity of all the liquid-phase raw materials is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of dicumyl peroxide production, in particular to a dicumyl peroxide separation system. Background Art

[0002] Dicumyl peroxide is a white rhombus-shaped crystal with a melting point between 41°C and 42°C. It is insoluble in water but soluble in organic solvents such as ethanol and ether. It is a strong oxidant and is extremely active. It reacts violently with sulfur, perchloric acid, etc. It is also sensitive to light and heat. Its state is variable above 100°C and it decomposes rapidly at 120°C-125°C. There is even a risk of explosion when exposed to light or heat. It has a wide range of applications. In the rubber industry, it acts as an efficient vulcanizing agent to promote cross-linking of rubber molecules, comprehensively improving the hardness, strength, wear resistance, and aging resistance of rubber. It acts as an initiator in polymerization reactions, helping to form polymers such as polystyrene and polymethyl methacrylate. It can also be used as a cross-linking agent for polyethylene resins to optimize the performance of cable insulation materials.

[0003] In workshop production, the existing equipment requires that multiple liquid raw materials be added to the reactor (100-160°C) at the same time. However, when the external temperature is low, the temperature of each raw material when added differs greatly from the temperature inside the reactor, resulting in low reaction efficiency and uneven mixing. Moreover, after the product is discharged from the reactor, it needs to be filtered to remove larger particulate impurities. During the filtration process, the filtration efficiency is low and the filter plate is easily clogged, seriously affecting the production progress. In addition, the production temperatures of each device in the entire set of equipment are different, resulting in low energy utilization. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a dicumyl peroxide separation system, which premixes the various liquid raw materials in the premixing kettle through the provision of a premixing kettle, and preheats them by the high-temperature gas phase in the heating pipe. While the dispersion uniformity of the various liquid raw materials is improved, the production efficiency and energy utilization rate are greatly improved; the heat in the secondary cooling tank coil is used in the drying box after heat exchange, thereby improving the energy utilization rate; by the coordinated use of the rotating scraper and the purge pipe, the attachments on the filter plate are scraped off during filtration, and the gas in the purge pipe is intermittently purged, thereby greatly improving the filtration efficiency and production progress.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The dicumyl peroxide separation system includes a reactor and a premixing reactor. The reactor is connected to a primary cooling tank via a reactor outlet pipe. The primary cooling tank is connected to a distillation tower via a filter. The distillation tower is connected to a drying oven via a recrystallization tank. A feed port is provided on the reactor. A hemispherical disperser is provided inside the reactor. The hemispherical disperser is located directly below the feed port. The premixing tank is connected to the feed port via a pipe.

[0007] When the liquid phase or solid phase falls into the hemispherical disperser through the feed port, it contacts the arc surface of the hemispherical disperser and is dispersed into the reactor.

[0008] The interior of the reactor is provided with a reactor stirring paddle driven by a stirring motor, and the exterior of the reactor is provided with a reactor heat-insulating jacket.

[0009] A vertical perforated feeder is provided inside the reactor, and an ethylene feed pipeline is connected to the vertical perforated feeder.

[0010] A secondary cooling tank is provided between the distillation tower and the recrystallization kettle, a primary cooling tank coil is provided inside the primary cooling tank, a secondary cooling tank coil is provided inside the secondary cooling tank, the secondary cooling tank coil is connected to the drying box through a heat exchanger, a heat recycling pipeline is provided between the heat exchanger and the drying box, and the reactor is connected to the primary cooling tank coil.

[0011] The interior of the premixing kettle is provided with a premixing kettle stirring paddle, the exterior of the premixing kettle is provided with a premixing kettle heat preservation jacket, and the premixing kettle is connected with a liquid raw material inlet pipeline.

[0012] A filter plate is provided inside the filter, a rotating scraper driven by a driving motor is provided below the filter plate, and a filter discharge port is provided on the vertical wall of the filter plate.

[0013] The product produced by the reactor enters the filter in a "bottom-in, top-out" manner. The filtered impurities settle at the bottom of the filter by gravity. An insulation device is installed on the outside of the filter.

[0014] The filter discharge port is located above the filter plate, and the connection between the primary cooling tank coil and the filter is located below the filter plate.

[0015] The first-level cooling tank is connected to the premixing kettle insulation jacket through a heating pipe, and the drying box is connected to the filter through a purge pipe, and a purge pipe valve is provided on the purge pipe.

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

[0017] After the reactor gas replacement is complete, the liquid raw materials enter the premixing kettle through the liquid raw material inlet pipeline. The premixing kettle's agitator begins to operate, and the catalyst enters the premixing kettle. After premixing, the solid-liquid mixture falls through the feed port onto the hemispherical disperser and is dispersed into the reactor. The stirring motor drives the reactor's agitator to start operating, and ethylene enters the reactor through a vertical perforated feeder. After the reaction is complete, the product first enters the primary cooling tank for cooling, then enters the filter in a "bottom-in, top-out" manner. The drive motor drives the rotating scraper to start rotating. After filtration, it enters the distillation tower, and after cooling in the secondary cooling tank, enters the recrystallization kettle, and then enters the drying oven for drying. The hot air in the drying oven is mainly used to control the temperature of the premixing kettle. The secondary cooling tank coil is connected to the drying oven via a heat exchanger. When the liquid or solid phase falls through the feed port to the hemispherical disperser, it contacts the curved surface of the hemispherical disperser and is dispersed into the reactor.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The dicumyl peroxide separation system of the utility model is adopted. Through the setting of the premixing kettle, various liquid-phase raw materials are premixed in the premixing kettle, and are preheated by the high-temperature gas phase in the heating pipe. While the dispersion uniformity of the various liquid-phase raw materials is improved, the production efficiency and energy utilization rate are greatly improved; the heat in the secondary cooling tank coil is used in the drying box after heat exchange, which improves the energy utilization rate; through the coordinated use of the rotating scraper and the purge pipe, the attachments on the filter plate are scraped off during filtration, and the gas in the purge pipe is intermittently purged, which greatly improves the filtration efficiency and production progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a dicumyl peroxide separation system of the present invention;

[0021] In the figure: 1. Reactor; 2. Premixing kettle; 3. Filter; 4. Drying oven; 5. Stirring motor; 6. Reactor stirring paddle; 7. Ethylene feed pipe; 8. Vertical perforated feeder; 9. Feed port; 10. Hemispherical disperser; 11. Reactor insulation jacket; 12. Premixing kettle insulation jacket; 13. Premixing kettle stirring paddle; 14. Liquid raw material inlet pipe; 15. Filter plate; 16. Rotating scraper; 17. Drive motor; 18. Reactor outlet pipe; 19. Filter outlet; 20. Heat recycling pipe; 21. Heating pipe; 22. Purge pipe; 23. Purge pipe valve; 24. Primary cooling tank; 25. Distillation tower; 26. Secondary cooling tank; 27. Recrystallization kettle; 28. Heat exchanger; 29. ​​Secondary cooling tank coil; 30. Primary cooling tank coil. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1 As shown, the dicumyl peroxide separation system includes a reactor 1 and a premixing tank 2. Reactor 1 is connected to a primary cooling tank 24 via a reactor outlet pipe 18. Primary cooling tank 24 is connected to a distillation tower 25 via a filter 3. Distillation tower 25 is connected to a drying oven 4 via a recrystallization tank 27. Reactor 1 is provided with a feed port 9. A hemispherical disperser 10 is located directly below feed port 9. Premixing tank 2 is connected to feed port 9 via a pipe. When the liquid or solid phase falls through feed port 9 into hemispherical disperser 10, it contacts the curved surface of hemispherical disperser 10 and is dispersed into reactor 1. Reactor 1 is equipped with a stirring paddle 6 driven by a stirring motor 5. Reactor 1 is also equipped with a reactor insulation jacket 11. Reactor 1 is also equipped with a vertical perforated feeder 8, to which an ethylene feed pipe 7 is connected. A secondary cooling tank 26 is located between the distillation tower 25 and the recrystallization kettle 27. A primary cooling tank coil 30 is located within the primary cooling tank 24. A secondary cooling tank coil 29 is located within the secondary cooling tank 26. The secondary cooling tank coil 29 is connected to the drying oven 4 via a heat exchanger 28. A heat recovery pipe 20 is located between the heat exchanger 28 and the drying oven 4. The reactor 1 is connected to the primary cooling tank coil 30. A premixing kettle agitator 13 is located within the premixing kettle 2. A premixing kettle insulation jacket 12 is located outside the premixing kettle 2. A liquid feedstock inlet pipe 14 is connected to the premixing kettle 2. A filter plate 15 is located within the filter 3. Below the filter plate 15 is a rotating scraper 16 driven by a drive motor 17. A filter outlet 19 is located on the wall of the filter plate 15. The filter outlet 19 is located above the filter plate 15. The connection between the primary cooling tank coil 30 and the filter 3 is located below the filter plate 15. The primary cooling tank 24 is connected to the premixing kettle insulation jacket 12 via a heating pipe 21 , and the drying box 4 is connected to the filter 3 via a purge pipe 22 , on which a purge pipe valve 23 is provided.

[0025] The above-mentioned dicumyl peroxide separation system, when in operation, comprises the following steps:

[0026] (1) After the gas replacement of the reactor 1 is completed, the diluent enters the premixing kettle 2 through the liquid raw material inlet pipeline 14, the premixing kettle stirring paddle 13 starts to work, the catalyst enters the premixing kettle 2, after the premixing is completed, the solid-liquid mixture falls through the feed inlet 9 to the semi-spherical disperser 10, is dispersed into the reactor 1, the stirring motor 5 drives the reactor stirring paddle 6 to start to work, and the ethylene enters the reactor 1 through the vertical hole feeding device 8; (2) After the reaction is completed, the product first enters the primary cooling tank 24 to be cooled, then enters the filter 3 in a "down-in and up-out" mode, the driving motor 17 drives the rotating scraper 16 to start to rotate, after the filtration is completed, enters the distillation tower 25, then is cooled through the secondary cooling tank 26, enters the recrystallization kettle 27, then enters the distillation recovery device, and then enters the drying box 4 to be dried; (3) The hot air in the drying box 4 is mainly used for temperature control of the premixing kettle 2.

Claims

1. A dicumyl peroxide separation system, characterized in that: The invention comprises a reactor (1) and a premixing reactor (2). The reactor (1) is connected to a primary cooling tank (24) via a reactor outlet pipe (18). The primary cooling tank (24) is connected to a distillation tower (25) via a filter (3). The distillation tower (25) is connected to a drying oven (4) via a recrystallization reactor (27). A feed port (9) is provided on the reactor (1). A hemispherical disperser (10) is provided inside the reactor (1). The hemispherical disperser (10) is located directly below the feed port (9). The premixing reactor (2) is connected to the feed port (9) via a pipe.

2. The dicumyl peroxide separation system according to claim 1, wherein: The interior of the reactor (1) is provided with a reactor stirring paddle (6) driven by a stirring motor (5), and the outside of the reactor (1) is provided with a reactor heat-insulating jacket (11).

3. The dicumyl peroxide separation system according to claim 1, wherein: A vertical perforated feeder (8) is provided inside the reactor (1), and an ethylene feed pipe (7) is connected to the vertical perforated feeder (8).

4. The dicumyl peroxide separation system according to claim 1, characterized in that: A secondary cooling tank (26) is provided between the distillation tower (25) and the recrystallization kettle (27), a primary cooling tank coil (30) is provided in the primary cooling tank (24), a secondary cooling tank coil (29) is provided in the secondary cooling tank (26), the secondary cooling tank coil (29) is connected to the drying box (4) through a heat exchanger (28), a heat recycling pipeline (20) is provided between the heat exchanger (28) and the drying box (4), and the reactor (1) is connected to the primary cooling tank coil (30).

5. The dicumyl peroxide separation system according to claim 1, characterized in that: The interior of the premixing kettle (2) is provided with a premixing kettle stirring paddle (13), the outer side of the premixing kettle (2) is provided with a premixing kettle insulation jacket (12), and the premixing kettle (2) is connected to a liquid raw material inlet pipeline (14).

6. The dicumyl peroxide separation system according to claim 4, characterized in that: The filter (3) is provided with a filter plate (15) inside, a rotating scraper (16) driven by a driving motor (17) is provided below the filter plate (15), and a filter discharge port (19) is provided on the vertical wall of the filter plate (15).

7. The dicumyl peroxide separation system according to claim 6, characterized in that: The filter discharge port (19) is located above the filter plate (15), and the connection between the primary cooling tank coil (30) and the filter (3) is located below the filter plate (15).

8. The dicumyl peroxide separation system according to claim 4, characterized in that: The primary cooling tank (24) is connected to the premixing kettle insulation jacket (12) via a heating pipe (21), and the drying box (4) is connected to the filter (3) via a purge pipe (22). A purge pipe valve (23) is provided on the purge pipe (22).

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