Dispersion agent feeding device for polymer polyol synthesis

Abstract

The utility model discloses a dispersing agent feeding device for polymer polyol synthesis, including setting in the dispersing agent storage bin of the synthesis reation kettle body upper end, the dispersing agent storage bin lower extreme is provided with the conical feeding hopper, the conical feeding hopper lower extreme is provided with the jet flow plugging component, the dispersing agent storage bin top is hinged with the upper end cover, the utility model relates to polymer polyol synthesis technical field, and the dispersing agent for polymer polyol synthesis is added to the dispersing agent storage bin, buckles the upper end cover, and utilizes the locking positioner and locks the upper end cover with the dispersing agent storage bin, and while injecting the basic polyether into the reaction kettle, starts the electric push rod on the upper end cover, utilizes the electric push rod and pushes the support rod and the pressure plate downlink, thereby through the conical extrusion head and presses the dispersing agent in the dispersing agent storage bin downwards, under the action of pressure, the dispersing agent promotes the jet flow plugging component action, thereby along the dispersing agent and sprays into the reaction kettle in the inclined direction, and the dispersing agent distribution is more uniform.

Description

Technical Field

[0001] This utility model relates to the field of polymer polyol synthesis technology, specifically to a dispersant feeding device for polymer polyol synthesis. Background Technology

[0002] Polymer polyols (POPs) are key modifying raw materials in the polyurethane industry. They are formed through in-situ polymerization of vinyl monomers on a polyether polyol matrix, exhibiting both flexible and rigid structural characteristics. Dispersants are required during POP synthesis to stabilize the dispersion of polymer particles within the base polyether. For example, polyether dispersants containing cyclic dicarboxylic anhydrides, through epoxide end-capping to enhance compatibility, can significantly reduce system viscosity and improve whiteness. In batch processes, the dispersant is typically added to the reactor along with a portion of the base polyether at the initial stage of the reaction to form a premixed system. Subsequently, under nitrogen protection, the system is heated to the polymerization temperature, and the remaining raw materials (such as vinyl monomers and initiators) are gradually added. Adding the dispersant and a portion of the base polyether to the reactor at once can easily lead to excessively high local concentrations, causing agglomeration and affecting the uniformity of the premixed system. This necessitates extending the mixing time, impacting the overall efficiency of polymer polyol synthesis. Therefore, this paper addresses these issues through in-depth research. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a dispersant feeding device for polymer polyol synthesis, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dispersant feeding device for polymer polyol synthesis, comprising a dispersant storage chamber located at the upper end of the synthesis reactor body, a conical feeding hopper at the lower end of the dispersant storage chamber, a jet sealing component at the lower end of the conical feeding hopper, an upper cover hinged to the top of the dispersant storage chamber, an electric push rod at the top of the upper cover, a locking and limiting component between the upper cover and the side wall of the dispersant storage chamber, a pressure plate inside the upper cover, a conical extrusion head at the lower end of the pressure plate, an upper part of the pressure plate connected to the telescopic end of the electric push rod via a support rod, a sealing ring on the outer circumference of the pressure plate, and the outer end of the sealing strip slidingly sealing against the inner wall of the dispersant storage chamber.

[0005] The aforementioned jet sealing component includes a valve seat, a support connector, an elastic pusher, and a conical sealing head. The valve seat is fixed on the lower end of the conical feeding hopper and located within the reactor body. The lower end face of the valve seat has a conical smooth surface. The support connector is installed on the lower end of the valve seat. The elastic pusher is installed on the support connector. The conical sealing head is disposed on the elastic pusher and contacts and seals with the conical smooth surface.

[0006] The aforementioned support connector includes a support frame and a fixing seat. The upper end of the support frame is welded and fixed to the side wall of the valve seat, and the fixing seat is disposed on the lower end of the support frame.

[0007] The aforementioned elastic pusher includes a compression spring, a fixed sleeve, and a sliding sleeve. The compression spring is fixedly mounted on a fixed base and fixedly connected to the lower end face of a conical sealing head. The fixed sleeve is fitted onto the outside of the compression spring and welded to the fixed base. The sliding sleeve is fitted onto the outside of the fixed sleeve and slides with the fixed sleeve. The upper end of the sliding sleeve is welded to the conical sealing head.

[0008] The aforementioned locking and limiting component includes a U-shaped limiting block fixed on the dispersant storage chamber, a locking bolt on the U-shaped limiting block, a fixing pin on one side of the upper end cover, a locking block rotatably mounted on the fixing pin, and a through hole on the locking block.

[0009] The U-shaped limiting block has a fixing hole and a threaded hole respectively on the side wall corresponding to the through hole. The fixing hole is used for the locking bolt to pass through, and the threaded hole is used to connect and fix with the locking bolt. Beneficial effects

[0010] This invention provides a dispersant feeding device for polymer polyol synthesis. It offers the following advantages: The device has a dispersant storage chamber at the upper end of the synthesis reactor. The dispersant for polymer polyol synthesis is added into the storage chamber, the upper cover is closed, and a locking and limiting component secures the upper cover to the storage chamber. Simultaneously, the base polyether is injected into the reactor, and an electric push rod on the upper cover is activated. This push rod drives the support rod and pressure plate downwards, thereby squeezing the dispersant in the storage chamber downwards through a conical extrusion head. Under pressure, the dispersant pushes the jet sealing component, spraying the dispersant into the reactor at an inclined direction, resulting in a more uniform distribution of the dispersant. During the feeding process, the stirring mechanism inside the reactor agitates the dispersant and base polyether, effectively improving the uniformity of the premixed system and preventing localized excessive concentrations that could lead to agglomeration. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of the dispersant feeding device for polymer polyol synthesis according to the present invention.

[0012] Figure 2 This utility model Figure 1 A partially enlarged structural diagram.

[0013] Figure 3 This is a three-dimensional structural diagram of the dispersant storage chamber described in this utility model.

[0014] Figure 4This is an isometric structural diagram of the U-shaped limiting block described in this utility model.

[0015] In the diagram: 1. Reactor body; 2. Dispersant storage bin; 3. Conical feed hopper; 4. Top cover; 5. Electric push rod; 6. Pressure plate; 7. Conical extrusion head; 8. Support rod; 9. Sealing ring; 10. Valve seat; 11. Conical sealing head; 12. Support frame; 13. Fixed seat; 14. Compression spring; 15. Fixed sleeve; 16. Sliding sleeve; 17. U-shaped limit block; 18. Locking bolt; 19. Fixing pin; 20. Locking block; 21. Fixing hole; 22. Threaded hole. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0017] Example: Refer to the appendix of the instruction manual Figure 1-4 As can be seen, this application specifically designs a dispersant feeding device for polymer polyol synthesis, including a dispersant storage chamber 2 located at the upper end of the synthesis reactor body 1, a conical feeding hopper 3 located at the lower end of the dispersant storage chamber 2, a jet sealing component located at the lower end of the conical feeding hopper 3, an upper cover 4 hinged to the top of the dispersant storage chamber 2, an electric push rod 5 located at the top of the upper cover 4, a locking and limiting component located between the upper cover 4 and the side wall of the dispersant storage chamber 2, a pressure plate 6 located inside the upper cover 4, a conical extrusion head 7 located at the lower end of the pressure plate 6, the upper part of the pressure plate 6 connected to the telescopic end of the electric push rod 5 via a support rod 8, a sealing ring 9 located on the outer ring surface of the pressure plate 6, and the outer end of the sealing strip slidingly sealing against the inner wall of the dispersant storage chamber 2. A distribution box is located at the upper end of the synthesis reactor body 1. The dispersant storage chamber 2 is used to add the dispersant for polymer polyol synthesis. The upper cover 4 is then fastened and locked to the dispersant storage chamber 2 using a locking and limiting component. Simultaneously, the base polyether is injected into the reactor. The electric push rod 5 on the upper cover 4 is activated, which pushes the support rod 8 and the pressure plate 6 downward. This causes the dispersant in the dispersant storage chamber 2 to be squeezed downward through the conical extrusion head 7. Under pressure, the dispersant pushes the jet sealing component to act, thereby spraying the dispersant into the reactor in an inclined direction. This results in a more uniform distribution of the dispersant. During the feeding process, the stirring mechanism inside the reactor is activated to stir the dispersant and the base polyether, which can effectively improve the uniformity of the premixed system and avoid localized excessive concentrations that could lead to agglomeration.

[0018] In specific implementation, the aforementioned jet sealing component includes a valve seat 10, a support connector, an elastic pusher, and a conical sealing head 11. The valve seat 10 is fixed on the lower end of the conical feeding hopper 3 and located inside the reactor body 1. The lower end face of the valve seat 10 has a conical smooth surface. The support connector is installed on the lower end of the valve seat 10, the elastic pusher is installed on the support connector, and the conical sealing head 11 is set on the elastic pusher and contacts the conical smooth surface for sealing. The support connector includes a support frame 12. The fixed seat 13 and the upper end of the support frame 12 are welded and fixed to the side wall of the valve seat 10. The fixed seat 13 is set on the lower end of the support frame 12. The above-mentioned elastic pushing component includes a compression spring 14, a fixed sleeve 15 and a sliding sleeve 16. The compression spring 14 is fixedly mounted on the fixed seat 13 and fixedly connected to the lower end face of the conical sealing head 11. The fixed sleeve 15 is fitted on the outside of the compression spring 14 and welded and fixed to the fixed seat 13. The sliding sleeve 16 is fitted on the outside of the fixed sleeve 15 and slides with the fixed sleeve 15. The upper end of the sliding sleeve 16 is welded and fixed to the conical sealing head 11. When the dispersant is added into the dispersant storage chamber 2, the conical sealing head 11, under the pushing action of the lower compression spring 14, contacts the lower conical smooth surface of the valve seat 10 to maintain a sealed state. When the base polyether is added into the reactor body 1, the electric push rod 5 is started, and the extension end of the electric push rod 5 is controlled to expand and push the pressure plate 6 downward. The pressure plate 6 and the conical extrusion head 7 extrude the dispersant. Under the pressure, the conical sealing head 11 moves downward and the compression spring 14 is compressed. At this time, the dispersant is sprayed downward along the inclined direction through the gap between the conical sealing head 11 and the conical smooth surface of the valve seat 10, which can effectively improve the uniformity of the dispersant distribution. Combined with the stirring mechanism in the reactor body 1, the efficiency of the premixing operation of the dispersant and the base polyether can be greatly improved. The pushing speed of the extension end of the electric push rod 5 is precise and controllable, which can effectively ensure that the dispersant addition speed is uniform and stable, and avoid the local concentration of dispersant being too high due to one-time addition.

[0019] In the specific implementation process, the above-mentioned locking and limiting component includes a U-shaped limiting block 17 fixed on the dispersant storage chamber 2. A locking bolt 18 is provided on the U-shaped limiting block 17. A fixing pin 19 is provided on one side of the upper end cover 4. A locking block 20 is rotatably installed on the fixing pin 19. A through hole is provided on the locking block 20. A fixing hole 21 and a threaded hole 22 are respectively provided on the side wall of the U-shaped limiting block 17 corresponding to the through hole. The fixing hole 21 is used for the locking bolt 18 to pass through, and the threaded hole 22 is used to connect and fix with the locking bolt 18. After the dispersant is put into the dispersant storage chamber 2, the upper end cover 4 is fastened, and the locking block 20 is moved so that the locking block 20 is inserted into the U-shaped limiting block 17. The locking bolt 18 passes through the fixing hole 21 and the through hole and is connected and fixed with the threaded hole 22. This can realize the quick assembly and fixation between the upper end cover 4 and the dispersant storage chamber 2. The structure is simple and the operation is convenient.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] 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 dispersant feeding device for polymer polyol synthesis, comprising a dispersant storage bin disposed at the upper end of the synthesis reactor body, characterized in that, The lower end of the dispersant storage chamber is provided with a conical feeding hopper, and the lower end of the conical feeding hopper is provided with a jet sealing component. The top of the dispersant storage chamber is hinged with an upper cover, and an electric push rod is provided on the top of the upper cover. A locking and limiting component is provided between the upper cover and the side wall of the dispersant storage chamber. A pressure plate is provided inside the upper cover, and a conical extrusion head is provided at the lower end of the pressure plate. The upper part of the pressure plate is connected to the telescopic end of the electric push rod through a support rod. A sealing ring is provided on the outer ring surface of the pressure plate, and the outer end of the sealing strip slides and seals against the inner wall of the dispersant storage chamber.

2. The dispersant feeding device for polymer polyol synthesis according to claim 1, characterized in that, The jet sealing component includes a valve seat, a support connector, an elastic pusher, and a conical sealing head. The valve seat is fixed on the lower end of the conical feeding hopper and located inside the reactor body. The lower end face of the valve seat has a conical smooth surface. The support connector is installed on the lower end of the valve seat. The elastic pusher is installed on the support connector. The conical sealing head is disposed on the elastic pusher and contacts and seals with the conical smooth surface.

3. The dispersant feeding device for polymer polyol synthesis according to claim 2, characterized in that, The support connector includes a support frame and a fixing seat. The upper end of the support frame is welded and fixed to the side wall of the valve seat, and the fixing seat is disposed on the lower end of the support frame.

4. The dispersant feeding device for polymer polyol synthesis according to claim 3, characterized in that, The elastic pusher includes a compression spring, a fixed sleeve, and a sliding sleeve. The compression spring is fixedly mounted on the fixed seat and fixedly connected to the lower end face of the conical sealing head. The fixed sleeve is fitted on the outside of the compression spring and welded to the fixed seat. The sliding sleeve is fitted on the outside of the fixed sleeve and slides with the fixed sleeve. The upper end of the sliding sleeve is welded to the conical sealing head.

5. The dispersant feeding device for polymer polyol synthesis according to claim 1, characterized in that, The locking and limiting component includes a U-shaped limiting block fixed on the dispersant storage bin, a locking bolt on the U-shaped limiting block, a fixing pin on one side of the upper end cover, a locking block rotatably mounted on the fixing pin, and a through hole on the locking block.

6. The dispersant feeding device for polymer polyol synthesis according to claim 5, characterized in that, The U-shaped limiting block has a fixing hole and a threaded hole respectively opened on the side wall corresponding to the through hole position. The fixing hole is used for the locking bolt to pass through, and the threaded hole is used to connect and fix with the locking bolt.

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