An apparatus for adding a catalyst to a polyester production

Abstract

The utility model provides a kind of adding device of catalyst for polyester production, cooperate with reaction kettle, the inside of reaction kettle is provided with stirring mechanism, and stirring mechanism includes stirring motor, stirring shaft and the stirring blade of being set on stirring shaft, adding device includes the feeding opening of being set on the upside of reaction kettle and the material disperser of being set in the inside of reaction kettle, and the inside of reaction kettle is communicated with feeding opening, and feeding opening is connected catalyst tank;Material disperser is fixedly connected with the inner wall of reaction kettle, and material disperser is rotatably connected with stirring shaft, and material disperser is located above stirring blade.The adding device of catalyst for polyester production has the advantages of scientific design, simple structure and good mixing effect, which facilitates direct addition of catalyst into polyester reaction kettle.

Description

Technical Field

[0001] This utility model relates to an auxiliary equipment for polyester production, specifically, to a catalyst addition device for polyester production. Background Technology

[0002] In the production of polyesters (such as PET, PBT, etc.), the addition of catalysts directly affects the reaction rate, product molecular weight, and product quality. To facilitate polyester production, simplify the operation steps within the reactor, and improve catalytic efficiency, ensuring thorough mixing of the catalyst and reactants, some production processes involve fully mixing the catalyst and slurry before adding them together to the reactor for polymerization. Examples include a polyester catalyst addition system disclosed in Chinese Patent CN214636206U and a polyester catalyst addition device disclosed in Chinese Patent CN206911314U. However, this premixing process may lead to side reactions. For instance, Chinese Patent CN120325163A discloses a distributed addition device and method for preparing raw materials for liquid titanium-based polyester polycondensation catalysts. This involves setting multiple receiving trays on the stirring shaft in the reactor. After the material enters the reactor, it is premixed on the receiving trays. After feeding stops, the receiving trays disperse to act as stirring blades. However, to accommodate the receiving trays, numerous adjustment grooves are installed on the stirring shaft, making it impossible to assemble the stirring blades. This means that stirring cannot occur in the reactor during feeding, preventing simultaneous stirring and feeding. If catalyst needs to be added midway through the reaction, stirring in the reactor must be paused.

[0003] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a catalyst addition device for polyester production.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A catalyst addition device for polyester production is provided, which is used in conjunction with a reactor. The reactor is equipped with a stirring mechanism, which includes a stirring motor, a stirring shaft, and stirring blades mounted on the stirring shaft. The addition device includes a feed port located on the upper side of the reactor and a material disperser located inside the reactor. The feed port is connected to the interior of the reactor and is connected to a catalyst tank. The material disperser is fixedly connected to the inner wall of the reactor and rotatably connected to the stirring shaft, and is located above the stirring blades.

[0006] The material disperser includes a dispersing plate with a number of dispersing holes evenly distributed on it. A mounting base is located at the center of the dispersing plate, and the stirring shaft is rotatably connected to the mounting base.

[0007] Above the dispersion plate are several mixing plates and a drive mechanism that drives the mixing plates to move up and down reciprocally.

[0008] The drive mechanism includes a reciprocating screw mounted on the upper side of the mounting base and a vertical guide post mounted on the dispersion plate. The lower end of the reciprocating screw is connected to the upper end of the stirring shaft, and the upper end of the reciprocating screw is connected to the output end of the stirring motor. The mixing plate is provided with a screw nut and a vertical guide sleeve. The screw nut is threadedly connected to the transmission screw, and the vertical guide post passes through the vertical guide sleeve and is slidably connected to the vertical guide sleeve.

[0009] The dispersion plate, mixing plate, stirring shaft, and reciprocating screw are coaxially arranged. The edge of the mixing plate is bent upward to form a shallow plate structure. Several through holes are evenly arranged on the horizontal part of the mixing plate. The projection of the feed port on the horizontal plane is close to the side wall of the reactor and is staggered with each through hole. Each through hole is arranged circumferentially around the reciprocating screw.

[0010] An annular rubbing block is set at the edge of the mixing plate, and the annular rubbing block is tangent to the inner wall of the reactor.

[0011] The reactor is externally fitted with a jacket and several connecting seats. The connecting seats are located above the jacket. With the connecting seats as the boundary, the stirring blades are located below the connecting seats, the mixing plate is located above the connecting seats, and the dispersing plate is close to the connecting seats.

[0012] Compared to existing technologies, this invention offers several advantages. It provides a catalyst addition device for polyester production that features a scientific design, simple structure, and excellent mixing effect, facilitating the direct addition of catalyst to the polyester reactor. Specifically, the catalyst is fed into the reactor through the feed port, enters the dispersion plate from the center of the mixing plate, and is then evenly dispersed into the reactor. The stirring motor, when activated, simultaneously drives the stirring shaft and reciprocating screw in the reactor, causing the mixing plate to move up and down. The stirring blades rotate with the stirring shaft, significantly improving the mixing efficiency of the catalyst in the reactor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the material disperser in this utility model.

[0015] In the diagram: 1. Reactor; 2. Feed port; 3. Stirring shaft; 4. Stirring blades; 5. Dispersion plate; 6. Mixing plate; 7. Reciprocating screw; 8. Vertical guide column; 9. Connecting seat; 10. Jacket; 11. Stirring motor; 12. Through hole; 13. Dispersion hole. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. "Installed," "equipped with," and "connected" can employ conventional means in the prior art, such as integral installation, snap-fit ​​installation, welding connection, adhesive connection, bolted connection, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances and select suitable connection, setting, or installation methods from the existing technology.

[0018] like Figure 1-2 As shown, a catalyst addition device for polyester production is provided, which works in conjunction with a reactor 1. The reactor 1 has an internal stirring mechanism, including a stirring motor 11, a stirring shaft 3, and stirring blades 4 mounted on the stirring shaft 3. The addition device includes a feed port 2 located on the upper side of the reactor 1 and a material disperser located inside the reactor 1. The feed port 2 communicates with the interior of the reactor 1 and is connected to a catalyst tank. The material disperser is fixedly connected to the inner wall of the reactor 1 and rotatably connected to the stirring shaft 3, and is positioned above the stirring blades 4. Specifically, the stirring motor is located outside the reactor, the stirring shaft is located inside the reactor and coaxial with it, and the stirring blades can employ a common stirring structure.

[0019] The catalyst addition device for polyester production features a scientific design, simple structure, and excellent mixing effect, facilitating the direct addition of catalyst to the polyester reactor. Specifically, the catalyst is fed into the reactor through the feed port, enters the dispersion plate from the center of the mixing plate, and is then evenly dispersed into the reactor through the dispersion plate. The stirring motor, when activated, simultaneously drives the stirring shaft and reciprocating screw in the reactor, causing the mixing plate to move up and down. The stirring blades rotate with the stirring shaft, significantly improving the mixing efficiency of the catalyst in the reactor.

[0020] In one embodiment, the material disperser includes a dispersion plate 5, the edge of which is fixedly connected to the inner wall of the reactor. A plurality of dispersion holes 13 are uniformly arranged on the dispersion plate 5, and a mounting base is provided at the center of the dispersion plate 5. The stirring shaft 3 is rotatably connected to the mounting base.

[0021] In one embodiment, a plurality of mixing plates 6 and a driving mechanism for driving the mixing plates 6 to move up and down are provided above the dispersing plate 5, so as to facilitate the up and down movement of the mixing plates to mix the flow.

[0022] In one embodiment, the drive mechanism includes a reciprocating screw 7 disposed on the upper side of the mounting base and a vertical guide column 8 disposed on the dispersion plate 5. The lower end of the reciprocating screw 7 is drivenly connected to the upper end of the stirring shaft 3, and the upper end of the reciprocating screw 7 is drivenly connected to the output end of the stirring motor 11. A screw nut and a vertical guide sleeve are disposed on the mixing plate 6. The screw nut is threadedly connected to the transmission screw, and the vertical guide column 8 passes through the vertical guide sleeve and is slidably connected to the vertical guide sleeve to guide the mixing plate. Preferably, four sets of vertical guide columns can be provided, arranged circumferentially around the reciprocating screw. To improve the stability of the structure, the upper end of the vertical guide column can be fixedly connected to the top surface of the reactor, and the lower end can be fixedly connected to the dispersion plate. In one embodiment, the dispersion plate 5, mixing plate 6, stirring shaft 3, and reciprocating screw 7 are coaxially arranged. Preferably, the reciprocating screw and stirring shaft are integrated, with threads on the upper part and stirring blades connected to the lower part. The edge of the mixing plate 6 is bent upward to form a shallow disc structure. A plurality of through holes 12 are evenly arranged on the horizontal part of the mixing plate 6. The projection of the feed port 2 on the horizontal plane is close to the side wall of the reactor 1 and is staggered with each through hole 12. Each through hole 12 is arranged circumferentially around the reciprocating screw 7. Specifically, the through holes are willow leaf-shaped, the dispersion holes are circular, and the through holes are much larger than the dispersion holes.

[0023] In one embodiment, an annular wiping block is provided at the edge of the mixing plate 6, and the annular wiping block is tangential to the inner wall of the reactor 1. Specifically, the annular wiping block is a flexible block or a flexible brush, which can prevent the catalyst from sticking to the upper part of the inner wall of the reactor 1.

[0024] In one embodiment, the reactor 1 is provided with a jacket 10 and several connecting seats 9 on its exterior. The connecting seats 9 are located above the jacket 10. The connecting seats facilitate connection with the frame and assembly of the reactor. The jacket facilitates adjustment of the reaction temperature. With the connecting seats 9 as the boundary, the stirring blades 4 are located on the lower side of the connecting seats 9, the mixing plate 6 is located on the upper side of the connecting seats 9, and the dispersing plate 5 is close to the connecting seats 9.

[0025] The above embodiments can be combined with each other.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A catalyst addition device for polyester production, used in conjunction with a reaction vessel, wherein the reaction vessel is equipped with a stirring mechanism, the stirring mechanism comprising a stirring motor, a stirring shaft, and stirring blades disposed on the stirring shaft, characterized in that: The addition device includes a feed port located on the upper side of the reactor and a material disperser located inside the reactor. The feed port is connected to the interior of the reactor and is connected to a catalyst tank. The material disperser is fixedly connected to the inner wall of the reactor and rotatably connected to a stirring shaft, and is located above the stirring blades. The material disperser includes a dispersion plate with a plurality of dispersion holes evenly distributed on it. A mounting base is located at the center of the dispersion plate, and the stirring shaft is rotatably connected to the mounting base. A plurality of mixing plates and a drive mechanism for driving the mixing plates to reciprocate up and down are arranged above the dispersion plate.

2. The catalyst addition device for polyester production according to claim 1, characterized in that: The drive mechanism includes a reciprocating screw mounted on the upper side of the mounting base and a vertical guide post mounted on the dispersion plate. The lower end of the reciprocating screw is connected to the upper end of the stirring shaft, and the upper end of the reciprocating screw is connected to the output end of the stirring motor. The mixing plate is provided with a screw nut and a vertical guide sleeve. The screw nut is threadedly connected to the transmission screw, and the vertical guide post passes through the vertical guide sleeve and is slidably connected to the vertical guide sleeve.

3. The catalyst addition device for polyester production according to claim 2, characterized in that: The dispersion plate, mixing plate, stirring shaft, and reciprocating screw are coaxially arranged. The edge of the mixing plate is bent upward to form a shallow plate structure. Several through holes are evenly arranged on the horizontal part of the mixing plate. The projection of the feed port on the horizontal plane is close to the side wall of the reactor and is staggered with each through hole. Each through hole is arranged circumferentially around the reciprocating screw.

4. The catalyst addition device for polyester production according to claim 3, characterized in that: An annular rubbing block is set at the edge of the mixing plate, and the annular rubbing block is tangent to the inner wall of the reactor.

5. The catalyst addition device for polyester production according to claim 4, characterized in that: The reactor is externally fitted with a jacket and several connecting seats. The connecting seats are located above the jacket. With the connecting seats as the boundary, the stirring blades are located below the connecting seats, the mixing plate is located above the connecting seats, and the dispersing plate is close to the connecting seats.

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