A segmented alkylene oxide polymerization apparatus for a parallel reactor

Abstract

This utility model relates to the field of reactor technology, and in particular to a segmented olefin polymerization device using a parallel reactor. It includes symmetrically arranged supports on both sides, with the reactor mounted on the supports for segmented olefin polymerization. The reactor includes a main body assembly, comprising a vessel body mounted on the supports, a vessel cover mounted on the upper end of the vessel body, a shaft cylinder rotatably mounted through the lower end of the vessel cover, a first gear fixed to the outer wall of the upper end of the shaft cylinder, a shaft rod rotatably mounted inside the shaft cylinder, a second gear fixed to the outer wall of the upper end of the shaft rod, a third gear rotatably mounted inside the vessel cover and meshing with the first gear, and a fourth gear rotatably mounted inside the vessel cover and meshing with the third and second gears. By employing differential reverse stirring and precise temperature control technology, the problem of uneven mixing of high-viscosity materials is effectively solved, and flexible segmented or synchronous production is achieved through a parallel feeding and discharging system, improving reaction efficiency, product consistency, and operational stability.

Description

Technical Field

[0001] This utility model relates to the field of reactor technology, specifically to a segmented olefin polymerization device for parallel reactors. Background Technology

[0002] Oxidative olefin polymerization is a key industrial process for producing bulk chemicals such as polyethers and nonionic surfactants. This type of reaction typically involves the stepwise addition of reactive monomers such as ethylene oxide and propylene oxide, and the process is significantly exothermic with a wide range of material viscosity variations.

[0003] According to CN208959897U, a reaction vessel for laboratory lifting-type polyolefin polymerization production is disclosed. This technology discloses a technical solution including "a reaction vessel, a support frame fixed to the lower end of the reaction vessel by welding, a stirring motor fixed to the lower surface of the support frame by welding, a rotating rod connected to the end of the stirring motor, a stirring rod fixed to the upper end of the rotating rod through the surface of the reaction vessel by welding, a scraper frame provided inside the reaction vessel, and one end of the scraper frame fixed to the surface of the rotating rod by welding". It has the technical effects of "the rotating rod carrying the stirring rod rotates inside the reaction vessel by the rotation of the stirring motor, and the scraper rotates inside the reaction vessel by the scraper frame and the buffer spring, and the scraper contacts the inside of the reaction vessel, which increases the uniformity of polymer mixing, reduces polymer agglomeration and adhesion to the inner wall of the reaction vessel, improves the cleanliness of the reaction vessel, avoids opening the reaction vessel for cleaning, and increases the effective time of the polymerization reaction".

[0004] In the process of olefin polymerization, the viscosity of the material increases sharply as the reaction proceeds, often resulting in a significant decrease in mixing efficiency. The above-mentioned solutions are difficult to achieve both overall circulation and local shearing of high-viscosity materials at the same time, which leads to the formation of mixing dead zones in the reactor, uneven dispersion of materials and catalysts, and failure to remove reaction heat in time. This results in a series of process defects such as local overheating, uncontrolled reaction process, and deterioration of molecular weight distribution. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a segmented olefin polymerization device with a parallel reactor. By employing differential reverse stirring and precise temperature control technology, it effectively solves the problem of uneven mixing of high-viscosity materials. Furthermore, the parallel feeding and discharging system enables flexible segmented or synchronous production, thereby improving reaction efficiency, product consistency, and operational stability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a parallel-type reactor for segmented olefin oxidation polymerization, comprising symmetrically arranged supports on both sides, wherein a reactor is mounted on the supports for segmented olefin oxidation polymerization, and the reactor comprises:

[0007] The main components include a vessel body mounted on a support, a vessel cover mounted on the upper end of the vessel body, a shaft cylinder rotatably mounted through the lower end of the vessel cover, a first gear fixed to the outer wall of the upper end of the shaft cylinder, a shaft rod rotatably mounted inside the shaft cylinder, a second gear fixed to the outer wall of the upper end of the shaft rod, a third gear rotatably mounted inside the vessel cover and meshing with the first gear, a fourth gear rotatably mounted inside the vessel cover and meshing with the third and second gears, a geared motor mounted on the upper end of the vessel cover for driving the shaft rod to rotate, a spiral blade fixed to the lower end of the shaft cylinder, a paddle blade fixed to the outer wall of the lower end of the shaft rod, and a heating layer provided on the outer wall of the vessel body.

[0008] Piping assembly, mounted on the main assembly and used for material conveying.

[0009] Preferably, the pipeline assembly includes a connecting pipe that passes through and is fixed inside the discharge port of the vessel body, an annular pipe is fixed at the upper end of the connecting pipe, and an array of nozzles is opened at the upper end of the annular pipe, and a regulating valve is fixed at the outer end of the connecting pipe.

[0010] Preferably, the pipeline assembly further includes a feed connector disposed between the left and right sides of the vessel body, the feed port of the vessel cover is connected to an upper valve, and the upper valves on both sides are connected to the feed connector through a pipeline and a tee pipe.

[0011] Preferably, the pipeline assembly further includes a discharge connector disposed between the left and right sides of the vessel body, the discharge port of the vessel body is connected to a lower valve, and the lower valves on both sides are connected to the discharge connector through a pipeline and a tee pipe.

[0012] Preferably, both ends of the outer wall of the heating layer are fixed with retaining rings, and two brackets are fixed on the left and right sides of the front end of the bracket. The upper end of the bracket is fixed with a retaining head that cooperates with the retaining ring.

[0013] Preferably, the second gear drives the first gear to rotate in the opposite direction through a fourth gear meshing with it and a third gear cooperating with it, thereby realizing the opposite rotation of the shaft and the shaft rod.

[0014] Beneficial effects

[0015] This invention provides a staged olefin polymerization apparatus with parallel reactors. Compared with the prior art, it has the following advantages:

[0016] 1. A single geared motor drives a sleeve structure with four-stage gear meshing, enabling the cylinder and shaft to rotate in opposite directions, which in turn drives the spiral blades and paddle blades to form a combined motion. The spiral blades scrape the wall and promote the overall circulation, while the paddle blades perform high-speed shearing, effectively solving the mixing dead zones and dispersion problems of high-viscosity materials. Combined with the precise control of the reaction temperature by the heating layer, it ensures that the polymerization process is uniformly heated and mixed across the entire viscosity range, thereby significantly improving the reaction rate and the consistency of the product molecular weight distribution.

[0017] 2. The feed connector, in conjunction with the independently controlled upper valve, supports simultaneous or segmented feeding of two reactors to meet diverse production needs; the discharge connector and lower valve support separate or mixed discharge of products, simplifying the post-processing process; the bottom connecting pipe and the annular nozzle structure enable reverse uniform feeding, enhancing the initial dispersion effect of mixing; the constraint of the clamp and the clamp ring effectively suppresses stirring vibration, ensuring long-term stable operation of the equipment. The overall device features high efficiency, versatility, and high reliability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the reaction vessel in this utility model;

[0020] Figure 3 This utility model Figure 2 A schematic diagram of the structure of part A in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of the support in this utility model.

[0022] In the diagram: 1. Support; 2. Reactor; 21. Main component; 211. Reactor body; 212. Reactor cover; 213. Shaft; 214. First gear; 215. Shaft; 216. Second gear; 217. Third gear; 218. Fourth gear; 219. Gear motor; 2110. Ribbon blade; 2111. Paddle blade; 2112. Heating layer; 22. Piping assembly; 221. Connecting pipe; 222. Annular pipe; 223. Regulating valve; 224. Feed connector; 225. Upper valve; 226. Discharge connector; 227. Lower valve; 3. Snap ring; 4. Bracket; 5. Clip. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a staged olefin oxidation polymerization device with parallel reactors, including supports 1 symmetrically arranged on the left and right sides, and a reactor 2 mounted on the supports 1 for staged olefin oxidation polymerization reaction. The reactor 2 includes:

[0025] The main component 21 includes a vessel body 211 mounted on a support 1. A vessel cover 212 is mounted on the upper end of the vessel body 211. A shaft cylinder 213 is rotatably mounted through the lower end of the vessel cover 212. A first gear 214 is fixed to the outer wall of the upper end of the shaft cylinder 213. A shaft rod 215 is rotatably mounted inside the shaft cylinder 213. A second gear 216 is fixed to the outer wall of the upper end of the shaft rod 215. A third gear 217 is rotatably mounted inside the vessel cover 212 and meshes with the first gear 214 for transmission. A fourth gear 218 is rotatably mounted inside the vessel cover 212 and meshes with the third gear 217 and the second gear 216 for transmission. A reduction motor 219 is mounted on the upper end of the vessel cover 212 and is used to drive the shaft rod 215 to rotate. A spiral blade 2110 is fixed to the lower end of the shaft cylinder 213. A paddle blade 2111 is fixed to the outer wall of the lower end of the shaft rod 215. A heating layer 2112 is provided on the outer wall of the vessel body 211.

[0026] Piping assembly 22 is mounted on main assembly 21 and is used for material conveying.

[0027] In this embodiment, after the geared motor 219 starts, the drive shaft 215 drives the second gear 216 to rotate. The second gear 216 transmits power to the fourth gear 218 meshing with it. The fourth gear 218 simultaneously drives the third gear 217 meshing with it to rotate. The third gear 217 further drives the first gear 214 meshing with it to rotate in the opposite direction, thereby driving the shaft cylinder 213 fixed to the first gear 214 to rotate in the opposite direction to the shaft 215. This causes the spiral blade 2110 located at the lower end of the shaft cylinder 213 to rotate in the opposite direction to the shaft 215. The paddle blades 2111 at the lower end form a differential counter-rotating motion combination. The ribbon blades 2110 mainly serve to scrape the inner wall of the reactor body 211 and promote the axial circulation of the entire material, while the paddle blades 2111 provide high-speed shearing to enhance local mixing and dispersion. Combined with the heating layer 2112 on the outer wall of the reactor body 211 to control the reaction temperature, this stirring system can efficiently cope with the drastic changes in material viscosity during the oxidative olefin polymerization process, ensuring that the reaction system is always uniformly heated and mixed, thereby significantly improving the efficiency of the polymerization reaction and the consistency of product quality.

[0028] Specifically, the pipeline assembly 22 includes a connecting pipe 221 that passes through and is fixed inside the discharge port of the vessel body 211. An annular pipe 222 is fixed at the upper end of the connecting pipe 221, and an array of nozzles is opened at the upper end of the annular pipe 222. A regulating valve 223 is fixed at the outer end of the connecting pipe 221.

[0029] In this embodiment, when bottom feeding or reaction material circulation is required, the regulating valve 223 is opened, and the material or reaction medium is conveyed upward through the connecting pipe 221 to the annular pipe 222 at its top, and evenly sprayed out to the bottom area of ​​the vessel body 211 through the nozzles arranged in an array at the upper end of the annular pipe 222. This structural design realizes the function of reverse feeding from the bottom of the reactor. The nozzle array arrangement allows the material to be evenly distributed in the bottom plane of the vessel, and is quickly captured and rolled into the mixing body by the rotating spiral blades 2110 and paddle blades 2111, improving the dispersion and mixing efficiency of the material under high-speed stirring.

[0030] Specifically, the pipeline assembly 22 also includes a feed connector 224 disposed between the left and right sides of the vessel body 211. The feed inlet of the vessel cover 212 is connected to an upper valve 225, and the upper valves 225 on both sides are connected to the feed connector 224 through a pipeline and a tee pipe.

[0031] In this embodiment, after the feed connector 224 is connected to the external feed pipeline, the operator can independently control the opening and closing of the valve 225 on either side to realize the directional conveying of oxidized olefins or other materials. It can simultaneously feed materials into two reactors for parallel production, or feed materials into a single reactor for segmented reaction.

[0032] Specifically, the pipeline assembly 22 also includes a discharge connector 226 disposed between the left and right sides of the vessel body 211. The discharge port of the vessel body 211 is connected to a lower valve 227, and the lower valves 227 on both sides are connected to the discharge connector 226 through a pipeline and a tee pipe.

[0033] In this embodiment, by independently or synchronously controlling the opening and closing of the two lower valves 227, the products of the two reactors can be discharged separately, or the products of the two reactors can be mixed and discharged together through a unified discharge connector 226.

[0034] Specifically, the outer walls of the heating layer 2112 are fixed with retaining rings 3 at both ends, and the front left and right sides of the bracket 1 are fixed with two brackets 4. The upper end of the bracket 4 is fixed with a retaining head 5 and cooperates with the retaining rings 3.

[0035] In this embodiment, when the reactor 2 is installed on the support 1, the circumferential constraint between the clamp 5 and the clamp ring 3 effectively suppresses the axial movement and circumferential deflection that may be caused by the reaction force generated by the differential speed reversal of the stirrer.

[0036] Specifically, the second gear 216 drives the first gear 214 to rotate in the opposite direction through the fourth gear 218 meshing with it and the third gear 217 cooperating with it, thereby realizing the opposite rotation of the shaft cylinder 213 and the shaft rod 215.

[0037] The working principle and usage process of this utility model are as follows: First, parallel or segmented feeding mode can be selected according to process requirements. If it is parallel production, the raw material is connected through the feeding connector 224, and the upper valve 225 of the feeding port of the two side lids 212 is opened at the same time to feed olefin oxide and initiator into the two reactors simultaneously. If segmented reaction is required, the upper valve 225 is independently controlled to feed the designated reactors in segments. In addition to top feeding, the material conveying can also be achieved by opening the regulating valve 223 at the outer end of the connecting pipe 221, so that the material is conveyed upward from the discharge port through the connecting pipe 221, and evenly sprayed into the bottom of the reactor body 211 by the nozzles arranged in an array on the top annular pipe 222 to achieve efficient dispersion.

[0038] During the reaction, the geared motor 219 is started to drive the shaft 215 to rotate. Through the meshing transmission of the second gear 216, the fourth gear 218, the third gear 217 and the first gear 214, the shaft cylinder 213 and the shaft 215 rotate in opposite directions at different speeds. This causes the spiral blades 2110 at the lower end of the shaft cylinder 213 to scrape the wall and promote the overall circulation of the material. At the same time, the paddle blades 2111 at the lower end of the shaft 215 perform high-speed shearing to enhance local mixing and dispersion. Together with the precise temperature control of the heating layer 2112, they work together to cope with the changes in material viscosity during the polymerization process and ensure a uniform and stable reaction.

[0039] After the reaction is completed, by controlling the lower valve 227 of the discharge port, the products in the two reactor bodies 211 can be discharged independently through the discharge connector 226, or mixed and discharged together, thus completing the entire polymerization process.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A staged olefin polymerization apparatus for parallel reactors, comprising supports symmetrically arranged on the left and right sides (1), characterized in that: The support (1) is equipped with a reactor (2) for performing a segmented polymerization reaction of oxidized olefins. The reactor (2) includes: The main component (21) includes a vessel body (211) mounted on a support (1). A vessel cover (212) is installed on the upper end of the vessel body (211). A shaft cylinder (213) is rotatably mounted through the lower end of the vessel cover (212). A first gear (214) is fixed to the outer wall of the upper end of the shaft cylinder (213). A shaft rod (215) is installed through the inside of the shaft cylinder (213). A second gear (216) is fixed to the outer wall of the upper end of the shaft rod (215). A third gear (217) is rotatably mounted inside the vessel cover (212) and is connected to it. The first gear (214) meshes and drives the vessel. The fourth gear (218) is rotatably installed inside the vessel cover (212) and meshes and drives the third gear (217) and the second gear (216). A geared motor (219) is installed on the upper end of the vessel cover (212) and is used to drive the shaft (215) to rotate. A spiral blade (2110) is fixed on the lower end of the shaft cylinder (213). A paddle blade (2111) is fixed on the outer wall of the lower end of the shaft (215). A heating layer (2112) is provided on the outer wall of the vessel body (211). Piping assembly (22) is mounted on main assembly (21) and used for material conveying.

2. The staged olefin polymerization apparatus of a parallel reactor according to claim 1, characterized in that: The pipeline assembly (22) includes a connecting pipe (221) that passes through and is fixed inside the discharge port of the vessel body (211). An annular pipe (222) is fixed at the upper end of the connecting pipe (221), and an array of nozzles is opened at the upper end of the annular pipe (222). A regulating valve (223) is fixed at the outer end of the connecting pipe (221).

3. The staged olefin polymerization apparatus of a parallel reactor according to claim 1, characterized in that: The pipeline assembly (22) also includes a feed connector (224) disposed between the left and right sides of the vessel body (211). The feed inlet of the vessel cover (212) is connected to an upper valve (225), and the upper valves (225) on both sides are connected to the feed connector (224) through a pipeline and a tee pipe.

4. A staged olefin polymerization apparatus for parallel reactors according to claim 1, characterized in that: The pipeline assembly (22) also includes a discharge connector (226) disposed between the left and right sides of the vessel body (211). The discharge port of the vessel body (211) is connected to a lower valve (227), and the lower valves (227) on both sides are connected to the discharge connector (226) through a pipeline and a tee pipe.

5. A staged olefin polymerization apparatus for parallel reactors according to claim 1, characterized in that: Both ends of the outer wall of the heating layer (2112) are fixed with retaining rings (3), and two brackets (4) are fixed on the left and right sides of the front end of the bracket (1). The upper end of the bracket (4) is fixed with a retaining head (5) and cooperates with the retaining rings (3).

6. A staged olefin polymerization apparatus for parallel reactors according to claim 1, characterized in that: The second gear (216) drives the first gear (214) to rotate in the opposite direction through the fourth gear (218) meshing with it and the third gear (217) cooperating with it, thereby realizing the opposite rotation of the shaft cylinder (213) and the shaft rod (215).

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