Polymerization reaction device
By incorporating a catalyst feed distributor and a stirring shaft into the polymerization reactor, uniform dispersion of the catalyst and co-catalyst is achieved, solving the problem of explosive polymerization caused by uneven catalyst feeding and ensuring the stability of the polymerization reaction and the uniformity of the polymer.
Patent Information
- Application Number
- CN202422824344.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-19
AI Technical Summary
In existing polymerization reactors, uneven catalyst dispersion during POE preparation leads to excessively high local temperatures in the early stages of the polymerization reaction, which can easily cause explosive polymerization.
Design a polymerization reactor including a vertically arranged reactor body, a stirring assembly, and a catalyst feed distributor. The catalyst and co-catalyst are dispersed into the reactor body through multiple catalyst feed pipes and co-catalyst feed pipes. Combined with the design of the stirring shaft and the guide tube, the catalyst and co-catalyst are uniformly dispersed to avoid local overheating.
It effectively prevents explosive polymerization in the early stages of the polymerization reaction, ensures the smooth progress of the polymerization reaction, and improves the uniformity of polymer properties.
Smart Images
Figure CN223454219U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to chemical equipment technical field especially relates to a polymerization device. BACKGROUND
[0002] According to the copolymer content in the polymer, the polyolefin material can be divided into two categories of polyolefin plastic body (POP) and polyolefin elastomer (POE), wherein the copolymer content in the POP is less than 20% (mass fraction), and the copolymer content in the POE is more than 20%, and the POE has no essential difference with the POP, but the high alpha-olefin content makes the POE have more excellent weather resistance and aging resistance. The structure of the polyolefin elastomer (POE) leads to high elasticity and toughness of rubber at room temperature, and it can be plasticized and formed at high temperature, has thermal reversibility, excellent mechanical properties, weather resistance and processing rheological properties, in addition, the POE has good affinity with polyolefin material, can effectively enhance the low-temperature toughness and has high cost performance, so it is widely applied in photovoltaic cells, automobile parts, aerospace, 5G / 6G communication and other fields, and greatly impacts the traditional rubber, plastic and other materials.
[0003] At present, the solution polymerization method is mostly used in the production of POE, but the existing polymerization device has the problem of uneven dispersion of catalyst feed when preparing POE by the solution method, which leads to high initial activity due to high local catalyst concentration in the system in the initial stage of polymerization reaction, and it is easy to cause problems such as explosive polymerization due to local high temperature. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of polymerization device, catalyst feed dispersion can be more uniform, effectively prevent the initial stage of polymerization reaction from causing the problem of explosive polymerization due to local high temperature.
[0005] The utility model aims at providing a kind of polymerization device, catalyst feed dispersion can be more uniform, effectively prevent the initial stage of polymerization reaction from causing the problem of explosive polymerization due to local high temperature.
[0006] The reaction kettle body is vertically arranged, and the top of the reaction kettle body is connected with the feed pipe group and a plurality of catalyst feed pipes in an on-off manner, and the bottom of the reaction kettle body is connected with the discharge pipe in an on-off manner;
[0007] The stirring assembly comprises a driving mechanism and a vertically arranged and hollow stirring shaft;The stirring shaft is located in the reaction kettle body, and the upper end of the stirring shaft extends out of the reaction kettle body and is connected with the driving mechanism, and stirring blades are further arranged on the stirring shaft;
[0008] The utility model provides a horizontally arranged and hollow catalyst feed distributor which is arranged in a reaction kettle body and close to the top of the reaction kettle body, and the lower ends of a plurality of catalyst feed pipes are inserted into the reaction kettle body and are connected to the side wall of the catalyst feed distributor in an openable and closable manner, a plurality of first discharge holes are arranged on the side wall of the catalyst feed distributor, a plurality of second discharge holes are arranged on the lower part of the stirring shaft, and the catalyst feed distributor is connected to the lower part of the stirring shaft in an openable and closable manner.
[0009] A plurality of cocatalyst feed pipes are arranged in a circumferential interval in the lower part of the reaction kettle body and are connected to the reaction kettle body in an openable and closable manner.
[0010] In a preferred embodiment of the utility model, the middle position of the catalyst feed distributor is vertically crossed and communicated with the upper part of the stirring shaft, and an adjusting valve is arranged on the stirring shaft and between the catalyst feed distributor and the second discharge holes of the top.
[0011] In a preferred embodiment of the utility model, the connecting positions of the plurality of catalyst feed pipes and the catalyst feed distributor are located on the same horizontal plane, and the connecting positions of the plurality of cocatalyst feed pipes and the reaction kettle body are located on the same horizontal plane.
[0012] In a preferred embodiment of the utility model, the cross sections of the catalyst feed distributor and the stirring shaft are circular, and the hole diameter of the second discharge hole is 1 / 10-1 / 2 of the diameter of the stirring shaft.
[0013] In a preferred embodiment of the utility model, a flow guide cylinder with open ends is further arranged in the reaction kettle body, and the flow guide cylinder is arranged below the catalyst feed distributor and is sleeved on the outside of the stirring shaft in an interval.
[0014] In a preferred embodiment of the utility model, the plurality of second discharge holes are all located in the flow guide cylinder.
[0015] In a preferred embodiment of the utility model, the axial length of the catalyst feed distributor is greater than the diameter of the flow guide cylinder.
[0016] In a preferred embodiment of the utility model, the flow guide cylinder is arranged at the bottom of the stirring shaft, the first stirring blade is arranged at the bottom of the stirring shaft, and at least one set of second stirring blades are arranged on the stirring shaft and in the flow guide cylinder.
[0017] In a preferred embodiment of the utility model, at least two baffles are circumferentially arranged on the side wall of the reaction kettle body, the baffle plate is vertically arranged, and the connecting positions of the cocatalyst feed pipes and the reaction kettle body are located below the baffles.
[0018] In a preferred embodiment of the utility model, the baffles are arranged opposite to the flow guide cylinder.
[0019] From the above, the polymeric reaction device in the utility model, set up multiple catalyst feed pipe, and set up catalyst feed distributor and design hollow structure with hole for stirring shaft, catalyst dispersed into after multiple catalyst feed pipe, then discharge or discharge at the same time through the action of multiple first discharge holes of catalyst feed distributor and multiple second discharge holes on stirring shaft, can make catalyst better dispersion, and the catalyst is dispersed into multiple catalyst feed pipe, so that catalyst and catalyst can enter the reaction kettle body in more dispersed form to initiate polymerization reaction, prevent aggregation, can effectively avoid the problem of local temperature too high caused by local high catalyst concentration in polymerization reaction system and cause explosive polymerization. BRIEF DESCRIPTION OF DRAWINGS
[0020] The following drawings are only intended to illustrate and explain the utility model, and do not limit the scope of the utility model. Among them:
[0021] Figure 1 It is the structure schematic view of polymeric reaction device provided by the utility model.
[0022] Explanation of reference numerals:
[0023] 1, reaction kettle body;11, feed pipe group;111, ethylene feed pipe;112, comonomer feed pipe;113, solvent feed pipe;114, nitrogen gas inlet pipe;12, catalyst feed pipe;13, catalyst aid feed pipe;14, discharge pipe;
[0024] 21, driving mechanism;22, stirring shaft;221, second discharge hole;222, regulating valve;23, first stirring blade;24, second stirring blade;
[0025] 3, catalyst feed distributor;31, first discharge hole;
[0026] 4, flow guide cylinder;
[0027] 5, baffle;
[0028] 6, heat preservation layer;61, cold and hot water circulating device inlet;62, cold and hot water circulating device outlet;
[0029] 71, first temperature detection element;72, first pressure detection element;73, safety accessory;74, second temperature detection element;75, second pressure detection element;76, sight glass;77, vent valve. DETAILED DESCRIPTION
[0030] In order to have more clear understanding of the technical features, purposes and effects of the utility model, now the specific implementation mode of the utility model is explained with the drawings.
[0031] As Figure 1 shown in the embodiment, a polymerization reaction device is provided, comprising:
[0032] a vertically arranged reactor body 1, the top of which is connected with a feed pipe group 11 and a plurality of catalyst feed pipes 12 in an openable and closable manner, and the bottom of which is connected with a discharge pipe 14 in an openable and closable manner;
[0033] a stirring assembly, comprising a driving mechanism 21 (such as a motor) and a vertically arranged and hollow stirring shaft 22, the stirring shaft 22 being located in the reactor body 1 and having its upper end extending out of the reactor body 1 and being connected with the driving mechanism 21, and a stirring blade being further arranged on the stirring shaft 22;
[0034] a horizontally arranged and hollow catalyst feed distributor 3, being located in the reactor body 1 and being arranged close to the top of the reactor body 1, the lower ends of the plurality of catalyst feed pipes 12 extending into the reactor body 1 and being connected with the side wall of the catalyst feed distributor 3 in an openable and closable manner, a plurality of first discharge holes 31 being arranged on the side wall of the catalyst feed distributor 3, a plurality of second discharge holes 221 being arranged on the lower part of the stirring shaft 22, and the catalyst feed distributor 3 being connected with the lower part of the stirring shaft 22 in an openable and closable manner;
[0035] a plurality of co-catalyst feed pipes 13, being arranged in a circumferential interval on the lower part of the reactor body 1 and being connected with the reactor body 1 in an openable and closable manner.
[0036] Thus, in the polymerization reaction device of the embodiment, a plurality of catalyst feed pipes 12 are arranged, and a catalyst feed distributor 3 is arranged and the stirring shaft 22 is designed as a hollow structure with holes, the catalyst is dispersed into the reactor body 1 through the plurality of catalyst feed pipes 12, and then is discharged through the plurality of first discharge holes 31 of the catalyst feed distributor 3 or simultaneously discharged through the plurality of first discharge holes 31 of the catalyst feed distributor 3 and the plurality of second discharge holes 221 on the stirring shaft 22, so that the catalyst can be better dispersed, the co-catalyst is dispersed into the reactor body 1 through the plurality of co-catalyst feed pipes 13, so that the catalyst and the co-catalyst can both enter the reactor body 1 in a more dispersed form to initiate the polymerization reaction, and the problem of local temperature being too high to cause explosive polymerization due to local high concentration of catalyst in the polymerization reaction system can be effectively avoided.
[0037] In a specific implementation manner, the middle position of the catalyst feed distributor 3 is vertically crossed and communicated with the upper part of the stirring shaft 22, and an adjusting valve 222 is arranged on the stirring shaft 22 and located between the catalyst feed distributor 3 and the second discharge holes 221 on the top.
[0038] The catalyst feeding distributor 3 and the stirring shaft 22 are both tubular structures with closed ends, and their axes are perpendicular. They can be integrally formed or separately formed and then fixed together perpendicularly. The regulating valve 222 can be used to control the opening and closing of the catalyst feeding distributor 3 and the lower part of the stirring shaft 22 (i.e. the part of the stirring shaft 22 provided with the second discharge holes 221), or to adjust the feeding speed of the catalyst into the lower part of the stirring shaft 22.
[0039] In use, the regulating valve 222 can be closed, and the catalyst is discharged into the reactor body 1 through the first discharge holes 31 after entering the catalyst feeding distributor 3 through the catalyst feeding pipes 12. Alternatively, the regulating valve 222 can be opened, and the opening degree of the regulating valve 222 is adjusted according to the actual required catalyst feeding speed. In this case, part of the catalyst is discharged into the reactor body 1 through the first discharge holes 31 after entering the catalyst feeding distributor 3 through the catalyst feeding pipes 12, and the other part enters the hollow stirring shaft 22 and is discharged into the reactor body 1 through the second discharge holes 221.
[0040] Preferably, the connection positions of the catalyst feeding pipes 12 and the catalyst feeding distributor 3 are located on the same horizontal plane, and the connection positions of the co-catalyst feeding pipes 13 and the reactor body 1 are located on the same horizontal plane. In installation, the catalyst feeding pipes 12 are arranged uniformly and at intervals around the axis of the reactor body 1, and the co-catalyst feeding pipes 13 are arranged uniformly and at intervals around the axis of the reactor body 1. In this arrangement, the catalyst and co-catalyst feeding can be more uniform and dispersed.
[0041] In this embodiment, the cross sections of the catalyst feeding distributor 3 and the stirring shaft 22 are circular, the number of the second discharge holes 221 is 2-20, and the diameter of the second discharge holes 221 is 1 / 10-1 / 2 of the diameter of the stirring shaft 22. The number of the catalyst feeding pipes 12 and the number of the co-catalyst feeding pipes 13 can be 2-10 or more.
[0042] Of course, the shapes of the components, the number of the first discharge holes 31, the second discharge holes 221, the catalyst feeding pipes 12 and the co-catalyst feeding pipes 13 can be determined according to actual conditions, and this embodiment is only for illustration.
[0043] Further, a flow guide cylinder 4 with open ends is arranged in the reactor body 1, and the flow guide cylinder 4 is arranged below the catalyst feeding distributor 3 and around the stirring shaft 22.
[0044] The cross section of the draft tube 4 can be circular, and can be fixed in the reactor body 1 in any way. The annular space between the draft tube 4 and the stirring shaft 22 can form a flow guide channel, and the material can be mixed in the flow guide channel. The size of the draft tube 4 can be determined as required, for example, the diameter of the draft tube 4 is 0.4-0.6 times the diameter of the reactor body 1, and the height of the draft tube 4 is 0.4-0.6 times the height of the reactor body 1.
[0045] As preferred, the plurality of second discharge holes 221 are located in the draft tube 4. The plurality of second discharge holes 221 are uniformly arranged corresponding to the part of the stirring shaft 22 in the length range of the draft tube 4. The axial length of the catalyst feed distributor 3 is greater than the diameter of the draft tube 4, so that the catalyst is more uniformly dispersed.
[0046] Referring to Figure 1 The draft tube 4 extends from the bottom of the stirring shaft 22, the first stirring blade 23 is arranged at the bottom of the stirring shaft 22, and at least one set of second stirring blades 24 is arranged on the stirring shaft 22 and located in the draft tube 4.
[0047] For example, in this embodiment, two sets of second stirring blades 24 are arranged in the draft tube 4 and spaced apart upwardly on the stirring shaft 22. The first stirring blade 23 at the bottom can be an anchor stirring paddle, the second stirring blade 24 at the lower part is located at 1 / 4-1 / 3 of the height of the reactor body 1, and the shape of the second stirring blade 24 should be able to make the flow turn downward; the second stirring blade 24 at the upper part is located at 1 / 2-2 / 3 of the height of the reactor body 1, and the shape of the second stirring blade 24 should be able to make the flow turn upward. The number and position of the second discharge holes 221 on the stirring shaft 22 can also be determined as required to adjust the speed of catalyst feeding and dispersion; the number, position and shape of the stirring blades can also be determined as required, and this embodiment is only for illustration.
[0048] Further, at least two baffles 5 are circumferentially spaced apart on the side wall of the reactor body 1, the plate surface of the baffle 5 is vertically arranged, and the connection position of the catalyst feed pipe 13 with the reactor body 1 is located below the baffle 5.
[0049] The plurality of baffles 5 are uniformly arranged along the circumference of the reactor body 1, the height of the baffle 5 is 1 / 4-3 / 4 of the height of the reactor body 1, the depth of the baffle 5 extending into the reactor body 1 is 1 / 20-1 / 10 of the diameter of the reactor body 1, and the baffle 5 is preferably arranged opposite to the draft tube 4. The number, position and size of the baffle 5 can be determined as required, and this embodiment is only for illustration.
[0050] Referring to Figure 1The outer surface of the reactor body 1 is provided with an insulation layer 6 for maintaining the temperature stability during the reaction process and reducing production costs and energy consumption. The insulation layer 6 may include a heat exchange tube bundle ( Figure 1 The accompanying pipe jacket is provided on the outer wall of the reactor body 1 and is provided with a hot and cold water circulation device inlet 61 and a hot and cold water circulation device outlet 62. The thermal insulation layer 6 keeps the reaction temperature in the polymerization reactor higher than the melting point of the polymer, so that the polymer exists in solution, reducing the risk of scaling in the reactor body 1.
[0051] Furthermore, the feed pipe group 11 includes an ethylene feed pipe 111, a comonomer feed pipe 112, and a solvent feed pipe 113. The feed pipe group 11 also includes a nitrogen inlet pipe 114. Corresponding valves are provided on each catalyst feed pipe 12, each cocatalyst feed pipe 13, the discharge pipe 14, the ethylene feed pipe 111, the comonomer feed pipe 112, the solvent feed pipe 113, and the nitrogen inlet pipe 114 to control the opening and closing of the corresponding valves and to control and adjust the flow rate.
[0052] A first temperature detecting element 71 and a first pressure detecting element 72 are provided on the side wall of the reactor body 1. A safety accessory 73 (such as a safety valve / bursting disc, etc.), a second temperature detecting element 74, a second pressure detecting element 75, a sight glass 76 and a vent valve 77 are also provided on the top of the reactor body 1. The first temperature detecting element 71 and the second temperature detecting element 74 can be, for example, thermometers to detect the temperature state in the polymerization reactor body 1; the first pressure detecting element 72 and the second pressure detecting element 75 can be, for example, pressure gauges to detect the pressure state in the reactor body 1 to ensure that it reacts under the most appropriate pressure state.
[0053] To facilitate processing and installation, the reactor body 1 includes a top head, an intermediate cylinder, and a bottom head that are detachably connected from top to bottom. The top and bottom heads give the reactor body 1 an upwardly concave arc shape at the top and a downwardly concave arc shape at the bottom, making it easier to clean, eliminating dead corners, and preventing material backlogs. This facilitates cleaning and maintenance, and reduces manufacturing costs. The feed pipe assembly 11 and the catalyst feed pipe 12 are both connected to the top head, the baffle 5 is connected to the intermediate cylinder, and the co-catalyst feed pipe 13 is connected to the intermediate cylinder and is located below the baffle 5. The bottom of the stirring shaft 22 can be located at the same horizontal position as the top of the bottom head. The discharge pipe 14 is connected to the bottom of the bottom head to discharge the reactants after the reaction.
[0054] The whole polymerization device can be used for self-polymerization and copolymerization of linear alpha-olefins, ethylene, propylene, etc., such as, but not limited to, ethylene, propylene, 1-butene, 1-hexene, 1-octene, etc.; the catalyst is an olefin polymerization catalyst commonly used in the industry, which is added in a conventional amount, such as a metallocene catalyst with titanium, zirconium, or chromium as the central atom, and the catalyst is used in an amount of, for example, 0.001-0.02 mol / L; the co-catalyst is, for example, an alkyl aluminum; the molar ratio of aluminum to metal atoms in the mixture of the metallocene catalyst and the alkyl aluminum is, for example, 400:1-1000:1; the operating temperature is, for example, 170-200°C; and the pressure of ethylene in the reaction kettle is, for example, 1.0-2.0 MPa.
[0055] In use, first, the nitrogen inlet pipe 114 and the outlet pipe 14 are opened, the air in the reaction kettle body 1 is replaced, then the outlet pipe 14 is closed, the ethylene feed pipe 111, the comonomer feed pipe 112, the solvent feed pipe 113, the plurality of catalyst feed pipes 12, and the plurality of co-catalyst feed pipes 13 are opened, and the ethylene, the comonomer, the inert solvent, the catalyst, and the co-catalyst are added to the reaction kettle body 1, while the stirring shaft 22 is rotated to stir and react, and the catalyst feed distributor 3 rotates with the stirring shaft 22. During the reaction, the temperature and pressure in the system are monitored by the second temperature detection element 74 and the second pressure detection element 75 located on the top head, and the first temperature detection element 71 and the first pressure detection element 72 located on the sidewall of the middle cylinder. After the reaction is completed, the material is discharged by opening the outlet pipe 14. The specific reaction parameters can be adjusted within the conventional parameter range in the industry according to the actual situation.
[0056] The co-catalyst is dispersedly added from the plurality of co-catalyst feed pipes 13 located at the lower part of the reaction kettle body 1, and the catalyst is added from the plurality of catalyst feed pipes 12 at the top, dispersed into the reaction kettle body 1 from the plurality of first discharge holes 31 on the catalyst feed distributor 3 and the plurality of second discharge holes 221 on the stirring shaft 22 to polymerize, while the first stirring blades 23 at the bottom make the material flow upward into the draft tube 4 when stirred, the second stirring blades 24 at the middle make the material flow downward when stirred, and the second stirring blades 24 at the top make the material flow upward when stirred, so that the material in the reaction kettle body 1 forms a double-flow state to prevent stratification; and the liquid raw material is affected by the centrifugal force and enters the reaction kettle body 1 outside the draft tube 4 from above the draft tube 4, and so on, and the baffle 5 provided on the sidewall of the reaction kettle body 1 can block the single flow direction in the reaction kettle body 1 and form a reverse flow direction radially, so that the reaction is more complete and uniform.
[0057] In summary, the polymerization device in the embodiment is a solution polymerization device, which is suitable for preparing polyolefin elastomer by solution polymerization, and the hollow hole catalyst feeding distributor 3 and the hollow hole stirring shaft 22 can make the catalyst well dispersed, the reaction is stable, and the problems of difficult initiation caused by the need of thermal initiation of the catalyst and difficult removal of the heat generated in the polymerization process are solved; the stirring and baffling measures in the reaction kettle body 1 solve the difference in polymer properties caused by the change of temperature and concentration gradient in the reaction kettle body 1 in the POE production process, and the polymer properties are uniform.
[0058] Through the cooperation of the plurality of catalyst feeding pipes 12, the catalyst feeding distributor 3 and the hollow hole stirring shaft 22, the catalyst can be better dispersed into the reaction kettle body 1 for polymerization, and through the action of the plurality of cocatalyst feeding pipes 13, the cocatalyst can be added from the lower part, and the action of the flow guide cylinder 4, the stirring blade and the baffle 5 makes the material, especially the catalyst and the cocatalyst, flow in various directions for rapid and sufficient mixing, so that the cocatalyst and the catalyst in the reaction kettle body 1 are dispersedly and sufficiently contacted with the reaction material, the initial activity can be inhibited, and the generation of local hot spots can be avoided, after the dispersed catalyst and the cocatalyst are contacted, the polymerization initiation will not be too violent, the heat can be removed in time, the local temperature is prevented from being too high, the rapid switching of the heating and heat removal polymerization environment is realized, the polymerization reaction is stably controlled, and the prepared polymer has uniform properties. Similarly, during the initial heating of the reaction, by controlling the dispersion of the catalyst feeding, in combination with the setting of the flow guide cylinder 4, the baffle 5 and the stirring blade, the material flows in various directions for rapid and sufficient mixing, so that the catalyst can be quickly and uniformly initiated.
[0059] The above is only a specific embodiment of the utility model, and is not used to limit the range of the utility model. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principles of the utility model shall belong to the protection range of the utility model.
Claims
1. A polymerization reactor apparatus characterized by, The polymerization reactor comprises: a vertically arranged reactor body, the top of which is connected with a feed pipe group and a plurality of catalyst feed pipes in an openable and closable manner, and the bottom of which is connected with a discharge pipe in an openable and closable manner; a stirring assembly, which comprises a driving mechanism and a vertically arranged and hollow stirring shaft, the stirring shaft is located in the reactor body and the upper end of the stirring shaft extends out of the reactor body and is connected with the driving mechanism, and stirring blades are arranged on the stirring shaft; a horizontally arranged and hollow catalyst feed distributor, which is located in the reactor body and is arranged close to the top of the reactor body, the lower ends of the plurality of catalyst feed pipes extend into the reactor body and are connected with the side wall of the catalyst feed distributor in an openable and closable manner, a plurality of first discharge holes are arranged on the side wall of the catalyst feed distributor, a plurality of second discharge holes are arranged on the lower part of the stirring shaft, and the catalyst feed distributor is connected with the lower part of the stirring shaft in an openable and closable manner; a plurality of co-catalyst feed pipes, which are arranged in a circumferential interval on the lower part of the reactor body and are connected with the reactor body in an openable and closable manner.
2. The polymerization reactor according to claim 1, wherein the middle position of the catalyst feed distributor is vertically crossed with the upper part of the stirring shaft in a communication manner, and an adjusting valve is arranged on the stirring shaft and between the catalyst feed distributor and the second discharge holes on the top.
3. The polymerization reactor according to claim 1, wherein the connection positions of the plurality of catalyst feed pipes with the catalyst feed distributor are located on the same horizontal plane, and the connection positions of the plurality of co-catalyst feed pipes with the reactor body are located on the same horizontal plane.
4. The polymerization reactor according to claim 1, wherein the cross sections of the catalyst feed distributor and the stirring shaft are circular, and the diameter of the second discharge holes is 1 / 10-1 / 2 of the diameter of the stirring shaft.
5. The polymerization reactor according to claim 1, wherein a flow guide cylinder with open ends is further arranged in the reactor body, the flow guide cylinder is arranged below the catalyst feed distributor and is arranged in an interval on the outside of the stirring shaft.
6. The polymerization reactor according to claim 5, wherein the plurality of second discharge holes are all located in the flow guide cylinder.
7. The polymerization reactor according to claim 5, wherein the axial length of the catalyst feed distributor is greater than the diameter of the flow guide cylinder.
8. The polymerization reactor according to claim 5, wherein the stirring shaft extends out of the flow guide cylinder at the bottom of the stirring shaft, a first stirring blade is arranged at the bottom of the stirring shaft, and at least one set of second stirring blades are arranged on the stirring shaft and in the flow guide cylinder.
9. The polymerization reactor according to claim 5, wherein at least two baffles are arranged in a circumferential interval on the side wall of the reactor body, the plate surface of the baffles is arranged vertically, and the connection positions of the co-catalyst feed pipes with the reactor body are located below the baffles.
10. The polymerization reactor according to claim 9, wherein the baffles are arranged opposite to the flow guide cylinder.