Polymerization reactor

Abstract

The utility model discloses a polymerization reactor which comprises a polymerization reactor tank body, a sealing cover is arranged at the top of the polymerization reactor tank body, a discharging pipe is arranged at the bottom of the polymerization reactor tank body, and a liquid inlet pipe and a feeding pipe are fixedly connected to the top of the sealing cover respectively. A motor arranged in the mixing reaction mechanism is driven to enable a rotating shaft, a cross rod, a stirring shaft and a scraper to rotate, the arranged stirring shaft can mix materials and solvents in the mixing reaction mechanism so as to achieve the effect of polymerization reaction, and the arranged scraper scrapes materials adhered to the interior of a polymerization reactor tank so as to improve the mixing effect of the polymerization reaction. Meanwhile, the influence on the next polymerization reaction can be avoided, and the arranged crushing screw rod rotates under the meshing rotation of the gear and the inner tooth groove, so that the particle materials in the polymerization reactor tank body can be conveniently crushed, and the polymerization reaction efficiency between the materials and the solvent is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of polymerization reactors, and in particular relates to a polymerization reactor. Background Art

[0002] Polymerization reactor is an important chemical reaction unit equipment in chemical production, which has the characteristics of good mixing effect, high momentum, heat and mass transfer efficiency. Among stirred reactors, gas-liquid stirred reactor is an important type. Gas-liquid stirred reactor is widely used, for example, in production processes such as oxidation, hydrogenation, aerobic fermentation, polymerization, etc. Compared with single-phase stirred reactor, gas-liquid stirred reactor has a dispersed gas phase in addition to the continuous liquid phase. This determines that the performance of gas-liquid stirred reactor mainly depends on macroscopic parameters such as impeller type, ventilation volume and input power. Among them, the blade shape and speed of the impeller determine the breakage of bubbles, bubble size and the dispersion of bubbles in the liquid phase, and the gas phase in the liquid phase will in turn enhance the turbulence of the fluid and form a gas-liquid interface. The role of the impeller in enhancing mass transfer is mainly reflected in: first, a high intensity of fluid shear stress is generated in the impeller area to break the bubbles and increase the contact area between the gas and liquid phases; at the same time, the broken small bubbles have a smaller rising speed in the liquid phase, thereby prolonging the contact time between the gas phase and the liquid phase. In addition, since most gas mass transfer processes are mainly controlled by liquid film resistance, stirring can increase the renewal rate of the liquid phase, thereby strengthening the mass transfer process between the gas and liquid phases.

[0003] For example, the application number CN201220120825.3 relates to a polymerization reactor, which mainly solves the problem of uneven stirring of materials inside the polymerization reactor in the prior art, resulting in the possibility of slurry accumulation and material blockage in the polymerization reactor, and low ethylene conversion rate. The utility model adopts a stirring paddle arranged inside; the stirring paddle includes a stirring shaft and at least two layers of stirring blades. It is characterized in that the bottom layer of the stirring paddle is an arc-shaped plate with an arc-shaped bottom and an outer side parallel to the reactor wall, and the vertical distance h2 between the arc edge of the arc plate and the corresponding bottom arc of the reactor and the distance h1 between the outer side of the paddle and the reactor wall meet the relationship: h1 / h2=1: (0.8~1.2). The technical solution solves the problem well and can be used in the industrial production of high-density polyethylene. However, in the comparative case, only the position of the vessel wall is stirred by a single arc plate, but the material adhered to the surface of the vessel wall is not processed, resulting in uneven material mixing, and also affecting the next mixing reaction, so it is difficult to meet the use requirements. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a polymerization reactor to solve the problem proposed in the above-mentioned background technology that in the comparative case, the position of the vessel wall is only stirred by a single arc plate, but the material adhered to the surface of the vessel wall is not processed, resulting in uneven material mixing and affecting the next mixing reaction, thereby making it difficult to meet the use requirements.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polymerization reactor, comprising a polymerization reactor tank body, a sealing cover is arranged on the top of the polymerization reactor tank body, a discharge pipe is arranged on the bottom of the polymerization reactor tank body, a liquid inlet pipe and a feed pipe are fixedly connected to the top of the sealing cover respectively, an internal tooth groove is provided at the upper end of the inner part of the polymerization reactor tank body, a motor is fixedly connected to the top of the sealing cover, a rotating shaft is fixedly connected to the output end of the motor, a stirring shaft is fixedly connected to the outer side of the rotating shaft, a cross bar is fixedly connected to the upper end of the outer side of the rotating shaft, scrapers are fixedly connected to both ends of the cross bar, crushing screws are rotatably connected to both ends of the inner part of the cross bar, a gear is fixedly connected to the upper end of the outer side of the crushing screw, and a filtering mechanism is arranged at the upper end of the outer side of the polymerization reactor tank body.

[0006] Preferably, the bottom of the polymerization reactor tank is fixedly connected with supporting legs.

[0007] Preferably, the sealing cover and the polymerization reactor tank are fixedly connected by bolts and nuts.

[0008] Preferably, a first control valve is fixedly connected to the outer side of the discharge pipe, and a second control valve is fixedly connected to the outer sides of the liquid inlet pipe and the feed pipe.

[0009] Preferably, a controller is fixedly connected to the outside of the polymerization reactor tank.

[0010] Preferably, a screen is provided at the lower end of the polymerization reactor tank.

[0011] Preferably, the scraper is attached to the inner wall of the polymerization reactor tank, and the gear and the inner tooth groove are meshedly connected.

[0012] Preferably, the filtering mechanism includes a gas filter box, a partition is fixedly connected to the inside of the gas filter box, a gas filter is fixedly connected to the bottom of the partition, a gas purifier is fixedly connected to the upper end of the gas filter box, an air pump is fixedly connected to the top of the gas filter box, and pipes are fixedly connected between the gas filter box, the gas purifier and the air pump.

[0013] Compared with the prior art, the utility model provides a polymerization reactor having the following beneficial effects:

[0014] 1. The utility model is provided with a mixing reaction mechanism composed of an inner tooth groove, a motor, a rotating shaft, a stirring shaft, a cross bar, a scraper, a pulverizing screw and a gear. When in use, the material and the solvent are respectively transported to the interior of the polymerization reactor tank through a liquid inlet pipe and a feed pipe. The polymerization reactor tank and a sealing cover are sealed, and then the rotating shaft, the cross bar, the stirring shaft and the scraper are rotated by driving the motor provided in the mixing reaction mechanism. The stirring shaft can mix the material and the solvent inside to achieve the effect of the polymerization reaction. The scraper is provided to scrape the material adhered to the inside of the polymerization reactor tank to improve the mixing effect of the polymerization reaction and avoid affecting the next polymerization reaction. The pulverizing screw is provided to rotate under the meshing rotation of the gear and the inner tooth groove, so as to crush the particulate material inside the polymerization reactor tank, thereby further improving the polymerization reaction efficiency between the material and the solvent.

[0015] 2. The utility model sets a filtering mechanism. When the nitrogen oxides are polymerized, the filtering mechanism located outside the polymerization reactor tank can filter and discharge the harmful gases. The gas inside the polymerization reactor tank is sucked into the gas filter box by an air pump. The gas is then filtered by a gas filter and a gas purifier to purify the gas, thereby preventing the harmful gases from causing harm to the workers.

[0016] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model has a scientific and reasonable structure, is safe and convenient to use, and provides great help to people. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the axial structure of one side of a polymerization reactor proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the axial structure of the other side of a polymerization reactor proposed by the utility model;

[0020] Figure 3 This is a schematic diagram of the top view of a polymerization reactor proposed by the utility model;

[0021] Figure 4 This is a schematic diagram of the internal tooth groove structure of a polymerization reactor proposed by the utility model;

[0022] Figure 5 This is a schematic cross-sectional view of a polymerization reactor proposed by the utility model;

[0023] Figure 6 This is a schematic diagram of the filtering mechanism structure of a polymerization reactor proposed by the utility model;

[0024] In the figure: polymerization reactor tank 1, sealing cover 2, supporting legs 3, discharge pipe 4, first control valve 5, controller 6, liquid inlet pipe 7, feed pipe 8, second control valve 9, screen 10, internal tooth groove 11, motor 12, rotating shaft 13, stirring shaft 14, cross bar 15, scraper 16, crushing screw 17, gear 18, gas filter box 19, partition 20, gas filter 21, gas purifier 22, air pump 23, pipeline 24. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-6 The utility model provides a technical solution: a polymerization reactor, including a polymerization reactor tank body 1, a sealing cover 2 is arranged on the top of the polymerization reactor tank body 1, a discharge pipe 4 is arranged on the bottom of the polymerization reactor tank body 1, a liquid inlet pipe 7 and a feed pipe 8 are fixedly connected to the top of the sealing cover 2, an internal tooth groove 11 is provided at the upper end of the polymerization reactor tank body 1, a motor 12 is fixedly connected to the top of the sealing cover 2, a rotating shaft 13 is fixedly connected to the output end of the motor 12, a stirring shaft 14 is fixedly connected to the outer side of the rotating shaft 13, a cross bar 15 is fixedly connected to the upper end of the outer side of the rotating shaft 13, a scraper 16 is fixedly connected to both ends of the cross bar 15, a crushing screw 17 is rotatably connected to both ends of the inner side of the cross bar 15, and a crushing screw 17 is fixedly connected to the upper end of the outer side of the crushing screw 17. The gear 18 drives the motor 12 in the mixing reaction mechanism to rotate the rotating shaft 13, the cross bar 15, the stirring shaft 14 and the scraper 16. The stirring shaft 14 can mix the internal material and the solvent to achieve the effect of the polymerization reaction. The scraper 16 scrapes the material adhered to the inside of the polymerization reactor tank 1 to improve the mixing effect of the polymerization reaction and avoid affecting the next polymerization reaction. The crushing screw 17 rotates under the meshing rotation of the gear 18 and the inner tooth groove 11 to crush the particulate material inside the polymerization reactor tank 1, thereby further improving the polymerization reaction efficiency between the material and the solvent. A filtering mechanism is provided at the upper end of the outer side of the polymerization reactor tank 1.

[0027] In the present invention, preferably, a support leg 3 is fixedly connected to the bottom of the polymerization reactor tank 1 .

[0028] In the present invention, preferably, the sealing cover 2 and the polymerization reactor tank body 1 are fixedly connected by bolts and nuts.

[0029] In the present utility model, preferably, the outer side of the discharge pipe 4 is fixedly connected with a first control valve 5 , and the outer sides of the liquid inlet pipe 7 and the feed pipe 8 are fixedly connected with a second control valve 9 .

[0030] In the present invention, preferably, a controller 6 is fixedly connected to the outside of the polymerization reactor tank 1 .

[0031] In the present invention, preferably, a screen 10 is provided at the lower end of the polymerization reactor tank 1 .

[0032] In the present invention, preferably, the scraper 16 is attached to the inner wall of the polymerization reactor tank 1, and the gear 18 and the inner tooth groove 11 are meshedly connected.

[0033] In the utility model, preferably, the filtering mechanism includes a gas filter box 19, a partition 20 is fixedly connected to the inside of the gas filter box 19, a gas filter 21 is fixedly connected to the bottom of the partition 20, a gas purifier 22 is fixedly connected to the upper end of the gas filter box 19, an air pump 23 is fixedly connected to the top of the gas filter box 19, and a pipe 24 is fixedly connected between the gas filter box 19, the gas purifier 22 and the air pump 23.

[0034] The working principle and use process of the utility model are as follows: when in use, the polymerization reactants and the solvent enter the reactor tank body 1 through the liquid inlet pipe 7 and the feed pipe 8. Inside the reactor, the stirring shaft 14 is rotated by the drive of the motor to achieve mixing of the material and the solvent. This mixing is a key step in the polymerization reaction, which helps to improve the reactivity and uniformity of the material. At the same time, the rotation of the cross bar 15 and the scraper 16 also plays an auxiliary role in the polymerization reaction. The scraper 16 can remove the material adhering to the inner wall of the tank body and prevent the material from forming an adhesion layer on the inner wall of the tank body, which can ensure that each polymerization reaction can be carried out in a clean reaction environment to avoid cross contamination. The crushing screw 17 is responsible for crushing the granular material, which can increase the surface area of ​​the material, improve the contact rate between the material and the solvent, and thus improve the efficiency of the polymerization reaction. During the polymerization reaction, gas will be generated , these gases are discharged through the discharge pipe 4 at the bottom of the polymerization reactor tank 1. In order to control the reaction process and ensure the safety of the reaction, a first control valve 5 is provided on the outside of the discharge pipe 4 to adjust and control the flow rate and pressure of the discharged gas. In addition, a filtering mechanism is provided on the upper end of the outside of the polymerization reactor tank 1, including components such as a gas filter box 19, a partition 20, a gas filter 21, a gas purifier 22 and an air pump 23. The filtering mechanism is used to purify and control the gas generated during the reaction to ensure the stability of the reaction environment. The entire polymerization reactor can also be automatically controlled by a controller 6 to achieve precise control and operation of the reaction process. In general, this polymerization reactor achieves efficient mixing of materials and solvents, automated control of the reaction process and efficient treatment of gases through its unique structure and well-designed components, thereby significantly improving the efficiency and quality of the polymerization reaction.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polymerization reactor, comprising a polymerization reactor tank (1), Features: The top of the polymerization reactor tank body (1) is provided with a sealing cover (2), the bottom of the polymerization reactor tank body (1) is provided with a discharge pipe (4), the top of the sealing cover (2) is respectively fixedly connected with a liquid inlet pipe (7) and a feed pipe (8), the upper end of the polymerization reactor tank body (1) is provided with an internal tooth groove (11), the top of the sealing cover (2) is fixedly connected with a motor (12), the output end of the motor (12) is fixedly connected with a rotating shaft (13), the outer side of the rotating shaft (13) is fixedly connected with a stirring shaft (14), the upper end of the outer side of the rotating shaft (13) is fixedly connected with a cross bar (15), both ends of the cross bar (15) are fixedly connected with a scraper (16), both ends of the inner side of the cross bar (15) are rotatably connected with a crushing screw (17), the upper end of the outer side of the crushing screw (17) is fixedly connected with a gear (18), and the upper end of the outer side of the polymerization reactor tank body (1) is provided with a filtering mechanism.

2. A polymerization reactor according to claim 1, Features: The bottom of the polymerization reactor tank (1) is fixedly connected with a support leg (3).

3. A polymerization reactor according to claim 1, Features: The sealing cover (2) and the polymerization reactor tank (1) are fixedly connected by bolts and nuts.

4. A polymerization reactor according to claim 1, Features: The outer side of the discharge pipe (4) is fixedly connected to a first control valve (5), and the outer sides of the liquid inlet pipe (7) and the feed pipe (8) are both fixedly connected to a second control valve (9).

5. A polymerization reactor according to claim 1, Features: A controller (6) is fixedly connected to the outside of the polymerization reactor tank (1).

6. A polymerization reactor according to claim 1, Features: A screen (10) is provided at the lower end of the polymerization reactor tank (1).

7. A polymerization reactor according to claim 1, Features: The scraper (16) is attached to the inner wall of the polymerization reactor tank (1), and the gear (18) and the inner tooth groove (11) are meshedly connected.

8. A polymerization reactor according to claim 1, Features: The filtering mechanism comprises a gas filter box (19), a partition (20) is fixedly connected inside the gas filter box (19), a gas filter (21) is fixedly connected to the bottom of the partition (20), a gas purifier (22) is fixedly connected to the upper end of the gas filter box (19), an air pump (23) is fixedly connected to the top of the gas filter box (19), and a pipeline (24) is fixedly connected between the gas filter box (19), the gas purifier (22) and the air pump (23).

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