Integrated recovery device for large PMMA (polymethyl methacrylate) composite product

Abstract

The utility model provides an integrated recovery device for large PMMA (polymethyl methacrylate) composite products, which comprises a recovery room for placing the PMMA composite products, a solvent spraying component is arranged at the top of the recovery room, and a liquid conveying pipeline is arranged at the bottom of the recovery room; and the recovery room is an assembled room body. According to the PMMA recycling device, the recycling room is arranged, the spraying assembly is arranged at the top of the recycling room, large composite products placed in the recycling room are dissolved to recycle PMMA through a solvent spraying method, and the PMMA recycling device has the advantage of saving energy; the dissolved liquid can be conveyed out for recycling through the liquid conveying pipeline; by means of the assembling type house body, the recycling house can be disassembled and assembled, and assembling can be conducted according to the size of a product.

Description

TECHNICAL FIELD

[0001] The utility model relates to PMMA composite material technical field especially relates to a PMMA composite product recycling device. BACKGROUND

[0002] Fiber reinforced polymethyl methacrylate (PMMA) base composite material is composed of PMMA resin matrix phase and fiber reinforced phase, and is a promising thermoplastic recyclable composite material. The traditional PMMA composite material after retirement mainly relies on its high temperature thermoplastic property for recycling. The PMMA+MMA binary liquid resin (patent application number: 202311621604.3) developed by our company can be recycled by solvent dissolution method, and the solvent is PMMA polymer monomer MMA. The recycling liquid is PMMA+MMA without other solvents, so the recycling liquid does not need further treatment and can be directly used for the production of PMMA and its composite materials. The reinforcing phase fiber in the corresponding composite material is also separated and can be used again. Therefore, PMMA base composite material is a green recyclable composite material.

[0003] PMMA liquid resin can be used for the production of large wind turbine blades and composite products such as ships. The recycling of these composite products after retirement in the future needs professional supporting recycling devices for processing to realize the recycling of resin and fiber resources. The existing recycling equipment needs to cut and crush large PMMA base composite materials, and recycle them by high temperature extrusion or injection molding. This will damage the continuous fibers of the reinforcing phase and limit the high value use of the fibers again. SUMMARY

[0004] In view of the above technical problems, the utility model provides a large PMMA composite product integrated recycling device, which solves the problem that the recycling equipment for PMMA liquid resin composite product cuts and crushes the material, damages the continuous fibers of the reinforcing phase, and limits the high value use of the fibers again in the prior art.

[0005] In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A large PMMA composite product integrated recycling device, comprising a recycling room for placing PMMA composite products, a solvent spraying assembly is arranged on the top of the recycling room, and a liquid delivery pipeline is arranged at the bottom of the recycling room; the recycling room is a assembled room body. The utility model discloses a recycling room, a spraying assembly is arranged on the top of the recycling room, and the large composite product placed in the recycling room is dissolved and recycled by spraying solvent, which has the advantages of energy saving; the dissolved liquid can be delivered out through the liquid delivery pipeline for recycling; the assembled room body not only enables the recycling room to be disassembled and spliced, but also can be spliced according to the size of the product.

[0007] Furthermore, the recycling room includes at least one recycling unit room, each of which is equipped with a solvent spraying assembly and a liquid conveying pipeline.

[0008] Furthermore, the bottom of the recycling unit is provided with a raised platform for supporting PMMA composite products.

[0009] Furthermore, the raised platform is provided with a perforated plate, on which multiple perforations are evenly distributed.

[0010] Furthermore, the solvent spraying assembly includes a spray pipe fixed to the top of the recycling unit and spray heads disposed on the spray pipe.

[0011] Furthermore, the recycling unit is equipped with a solvent delivery pipeline connected to the spray pipe; a delivery pump is installed on one side of the recycling unit, with the inlet of the delivery pump connected to a solvent liquid source and the outlet connected to the solvent delivery pipeline.

[0012] Furthermore, the liquid delivery pipeline includes an MMA input pipeline located at the bottom of the recycling unit room for injecting MMA liquid into the bottom inside the recycling unit room; the liquid delivery pipeline also includes a recycled liquid output pipeline connected to the bottom inside the recycling room for discharging the recycled liquid.

[0013] Furthermore, the recycling unit includes a lower part of the recycling room, a wall, and an upper part of the recycling room that are connected together. The liquid conveying pipeline is located in the lower part of the recycling room, and the solvent spraying assembly is located in the upper part of the recycling room.

[0014] Furthermore, the recycling room includes a recycling unit room, with side wall panels with flanges detachably connected to the front and rear end faces of the recycling unit room; or the recycling room includes at least two recycling unit rooms, with side wall panels with flanges detachably connected to the outer end faces of the recycling unit rooms located at both ends.

[0015] Furthermore, flanges are provided on the lower part, walls, and upper part of the recycling room. The upper part of the recycling room has an "n"-shaped structure, and the flanges on the upper part of the recycling room include "n"-shaped flanges set on the front and rear end faces of the "n"-shaped structure and "I"-shaped flange plates set on the two lower ends of the "n"-shaped structure. The walls have a rectangular plate structure, and the flanges on the walls include "U"-shaped flanges set around the edges of the walls. The lower part of the recycling room has a "U"-shaped structure, and the flanges on the lower part of the recycling room include "U"-shaped flanges set on the front and rear end faces of the "U"-shaped structure and "I"-shaped flange plates set on the two upper ends of the "U"-shaped structure. The "I"-shaped flange plates mate with the upper / lower sides of the "U"-shaped flanges. The front and rear sides of the "n"-shaped flanges, "U"-shaped flanges, and "U"-shaped flanges respectively mate with the front and rear sides or side wall flanges of the "n"-shaped flanges, "U"-shaped flanges, and "U"-shaped flanges on the adjacent recycling unit rooms.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model features a recycling room with a spray system on top. The system uses a solvent spraying method to dissolve and recycle PMMA from large composite products placed in the recycling room, which has the advantage of energy saving.

[0018] 2. The recycling room of this utility model is designed with multiple panels and flanges on the panels. The flanges allow the recycling room to be disassembled and assembled, solving the problem of storing and transporting large items.

[0019] 3. This utility model can solve the problem of overall recycling of large composite products by splicing together unit recycling rooms, according to the size of the composite products. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the structure of the spray assembly of this utility model;

[0024] Figure 4 This is a structural schematic diagram of Embodiment 5 of the present invention.

[0025] In the diagram: 1. Transfer pump; 2. Spray pipe; 3. Spray head; 4. Solvent delivery pipe; 5. Recycled liquid output pipe; 6. MMA input pipe; 7. Pressure sensor and pressure relief valve; 8. Temperature sensor; 9. Elevated platform; 10. Spray plate; 11. Support leg; 12. Lower part of the recycling room; 13. Wall; 14. Upper part of the recycling room; 15. Side wall panel; 16. Observation window. Detailed Implementation

[0026] 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.

[0027] like Figures 1-3 As shown in Embodiment 1 of this utility model, the integrated recycling device for large PMMA composite products includes a recycling chamber for placing PMMA composite products. The top of the recycling chamber is equipped with a solvent spraying assembly, and the bottom is equipped with a liquid conveying pipe. By placing large PMMA composite products in the recycling chamber, solvent (MMA liquid) is sprayed onto the PMMA composite products through the solvent spraying assembly at the top. The PMMA in the PMMA composite products gradually dissolves in the MMA, forming a PMMA+MMA recycled liquid. In this embodiment, the liquid conveying pipe includes a recycled liquid output pipe 5 connected to the bottom of the inner side of the recycling chamber for outputting the recycled liquid. After a certain dissolution time, the PMMA+MMA recycled liquid can be output through the recycled liquid output pipe 5. In a preferred embodiment, the liquid conveying pipe also includes an MMA input pipe 6 located at the bottom of the recycling chamber for injecting MMA liquid into the bottom of the inner side of the recycling chamber; at the start of dissolution, MMA liquid can also be injected into the bottom of the recycling chamber through the MMA input pipe 6 to accelerate the dissolution rate. The recycling room is a modular unit, which facilitates the assembly of the recycling room after large PMMA composite products are hoisted into it; it also allows for the assembly of recycling rooms of different sizes according to the size of the PMMA composite products.

[0028] In this embodiment, the recycling room includes at least one recycling unit room; that is, the recycling room can be a single recycling unit room or several recycling unit rooms assembled together. Each recycling unit room is equipped with a solvent spraying assembly and a liquid conveying pipeline.

[0029] Example 2 differs from Example 1 in that, as Figure 1As shown, the solvent spraying assembly includes a spray pipe 2 fixed to the top of the recycling unit and spray heads 3 mounted on the spray pipe 2. Figure 3 As shown, several spray pipes 2 can be installed, and the spray pipes 2 can be interconnected and installed on the top of the recycling unit room. In addition, spray heads 3 are evenly distributed on the lower side of each spray pipe 2.

[0030] Furthermore, such as Figure 1 As shown, the recycling unit is equipped with a solvent delivery pipe 4 connected to the spray pipe 2; a delivery pump 1 is installed on one side of the recycling unit, with its inlet connected to a solvent liquid source and its outlet connected to the solvent delivery pipe 4. The delivery pump 1 has a liquid viscosity detection component inside.

[0031] Example 3 differs from Example 2 in that, as Figure 1 and Figure 2 As shown, the bottom of the recycling unit is equipped with a raised platform 9 for supporting PMMA composite products. The raised platform 9 supports the PMMA composite products, creating a gap between the bottom of the PMMA composite products and the bottom of the recycling unit, which facilitates the bottom of the PMMA composite products contacting the solvent for dissolution.

[0032] Furthermore, such as Figure 2 As shown, the raised platform 9 is equipped with a slurry plate 10, which has multiple slurry holes evenly distributed on it. The slurry plate 10 provides more stable support for the PMMA composite product, and at the same time, it does not obstruct the solvent from contacting the bottom of the PMMA composite product, nor does it obstruct the flow of the dissolved liquid to the bottom of the recycling room for easy recycling through the output pipeline.

[0033] Example 4 differs from Example 3 in that, as Figure 1 and Figure 2 As shown, the recycling unit includes a lower recycling room 12, a wall 13, and an upper recycling room 14 that are connected together. The liquid conveying pipeline is located in the lower recycling room 12, and the solvent spraying assembly is located in the upper recycling room 14.

[0034] In one embodiment, the recycling room includes a single recycling unit, with side wall panels 15 with flanges detachably connected to both its front and rear end faces, thereby assembling a sealed recycling room. In another embodiment, the recycling room includes at least two recycling unit rooms, with side wall panels 15 with flanges detachably connected to the outer end faces of the recycling unit rooms located at both ends, thereby assembling a sealed recycling room.

[0035] Furthermore, such as Figure 1 and Figure 2As shown, flanges are provided on the lower part 12, wall 13, and upper part 14 of the recycling room to facilitate assembly. Specifically, the upper part 14 of the recycling room has an "n"-shaped structure, meaning it includes left and right sides and a top connecting the left and right sides, forming an approximate "n"-shaped structure. The flanges on the upper part 14 include "n"-shaped flanges located on the front and rear ends of the "n"-shaped structure and "I"-shaped flange plates located at the two lower ends of the "n"-shaped structure. Specifically, the "I"-shaped flange plates are located at the lower ends of the left and right sides. The "n"-shaped flanges are located on the front and rear sides of the left and right sides and the top.

[0036] Furthermore, the wall 13 is a rectangular plate structure, and the flanges on the wall 13 include "U"-shaped flanges set around the edge of the wall 13.

[0037] Furthermore, the lower part 12 of the recycling room has a "U"-shaped structure, meaning that the lower part 12 includes left and right sides and a bottom connecting the left and right sides, thus forming an approximate "U"-shaped structure. The flanges on the lower part 12 of the recycling room include "U"-shaped flanges located on the front and rear ends of the "U"-shaped structure and "I"-shaped flange plates located at the two upper ends of the "U"-shaped structure. Specifically, the "I"-shaped flange plates are located at the upper ends of the left and right sides. The "U"-shaped flanges are located on the front and rear sides of the left and right sides and the bottom.

[0038] The "I"-shaped flange plate mates with the upper / lower sides of the "U"-shaped flange and is connected by bolts. The front and rear sides of the "n"-shaped flange, "U"-shaped flange, and "U"-shaped flange respectively mate with the front and rear sides of the "n"-shaped flange, "U"-shaped flange, and "U"-shaped flange on the adjacent recycling unit, or the front / rear sides of the "n"-shaped flange, "U"-shaped flange, and "U"-shaped flange mate with the flanges of the corresponding side wall plates 15 and are connected by bolts. This completes the assembly of the recycling unit.

[0039] In addition, the side wall panel 15 is provided with a transparent glass observation window 16.

[0040] Example 5 differs from Example 4 in that a pressure sensor, a pressure relief valve 7, and a temperature sensor 8 are provided on the top of the upper part 14 of the recycling chamber. Support legs 11 are provided on the lower side of the bottom of the lower part 12 of the recycling chamber.

[0041] Example 6 differs from Example 5 in that it is a practical application of the large-scale integrated PMMA composite product recycling device. In this example, the large-scale integrated PMMA composite product recycling device is used for the recycling of continuous glass fiber reinforced PMMA-based inflatable boats. Details are as follows:

[0042] Based on the actual size of the inflatable boat, a recycling unit is needed. For example... Figure 1As shown, a crane is used to place the decommissioned assault boat onto the perforated plate 10 of the lower part 12 of the recycling room. The walls 13, the upper part 14, and the side wall panels 15 are then joined to the lower part 12 of the recycling room using flanges to form a sealed recycling unit. 1000L of MMA liquid (methyl methacrylate liquid) is injected into the bottom compartment of the unit through the MMA input pipe 6. The transfer pump 1 is turned on, and the MMA is sprayed through the spray system. The PMMA in the assault boat gradually dissolves in the MMA, forming a PMMA+MMA recycling liquid. Simultaneously, the PMMA gradually separates from the continuous glass fiber. When the viscosity sensor detects that the viscosity of the recycling liquid reaches 150 mPa·s, the transfer pump is turned off, and the PMMA+MMA recycling liquid is output through the recycling liquid output pipe 5. After new MMA is input through the MMA input pipe 6, solvent circulation spraying continues. After a certain period of time, through observation window 16, it was confirmed that the PMMA in the PMMA-based inflatable boat had completely dissolved. The PMMA, continuous glass fibers, and other solids insoluble in MMA had thus achieved solvent recovery and separation. Recovery complete. The power was turned off, the recovery chamber was disassembled, and a crane was used to retrieve the remaining continuous fibers or other solids. The recovery operation was then finished.

[0043] Example 7 differs from Example 5 in that it is a practical application of the large-scale integrated PMMA composite product recycling device. In this example, the large-scale integrated PMMA composite product recycling device is used for the recycling of continuous carbon fiber reinforced PMMA-based wind turbine blades. Details are as follows:

[0044] like Figure 4 As shown, based on the actual volume of the wind turbine blades, four recycling units are required. A crane is used to place the decommissioned wind turbine blades onto the perforated plate 10 on the lower part 12 of the recycling unit, according to... Figure 4 As shown, multiple walls 13, the upper part 14 and side wall panels 15 of the recycling room are spliced ​​with the lower part 12 of the recycling room via flanges to form a sealed multi-unit recycling room. 5000L of MMA liquid is injected into each unit's bottom compartment through multiple MMA input pipes 6. The transfer pump 1 is turned on, and the MMA is sprayed through the spray assembly, gradually dissolving PMMA in the MMA to form a PMMA+MMA recycling liquid. When the viscosity sensor detects that the viscosity of the recycling liquid reaches 200 mPa·s, the transfer pump is turned off, and the recycling liquid is output through the recycling liquid output pipe 5. New MMA is then input through the MMA input pipe 6, and the recycling process continues. After several cycles, it is confirmed through the observation window 16 that the PMMA of the wind turbine blade has completely dissolved, and the solvent recovery and separation of PMMA, continuous carbon fiber, and other solids insoluble in MMA has been completed. Recycling is complete. The power is turned off, the recycling room is disassembled, and a crane is used to retrieve the remaining continuous fibers or other solids, ending the recycling operation.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some or all of the technical features thereof, within the spirit and principles of the present invention, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A large-scale integrated recycling device for PMMA composite products, characterized in that, It includes a recycling chamber for placing PMMA composite products. A solvent spraying component is provided at the top of the recycling chamber, and a liquid conveying pipeline is provided at the bottom; the recycling chamber is a prefabricated housing body.

2. The integrated recycling device for large-scale PMMA composite products according to claim 1, characterized in that, The recycling chamber includes at least one recycling unit chamber, and a solvent spraying component and a liquid conveying pipeline are provided in each recycling unit chamber.

3. The integrated recycling device for large-scale PMMA composite products according to claim 2, characterized in that, A pedestal (9) for supporting the PMMA composite product is provided at the bottom of the recycling unit chamber.

4. The integrated recycling device for large-scale PMMA composite products according to claim 3, characterized in that, A perforated plate (10) is provided on the pedestal (9), and a plurality of leakage holes are evenly distributed on the perforated plate (10).

5. The integrated recycling device for large-scale PMMA composite products according to any one of claims 2 to 4, characterized in that, The solvent spraying component includes a spraying pipeline (2) fixed to the top of the recycling unit chamber and spray heads (3) provided on the spraying pipeline (2).

6. The integrated recycling device for large-scale PMMA composite products according to claim 5, characterized in that, A solvent conveying pipeline (4) connected to the spraying pipeline (2) is provided in the recycling unit chamber; a conveying pump (1) is provided on one side of the recycling unit chamber, the inlet of the conveying pump (1) is connected to a solvent liquid source, and the outlet is connected to the solvent conveying pipeline (4).

7. The integrated recycling device for large-scale PMMA composite products according to claim 6, characterized in that, The liquid conveying pipeline includes an MMA input pipeline (6) provided at the bottom of the recycling unit chamber for injecting MMA liquid into the inner bottom of the recycling unit chamber; the liquid conveying pipeline also includes a recycling liquid output pipeline (5) communicating with the inner bottom of the recycling chamber for outputting the recycling liquid.

8. The integrated recycling device for large-scale PMMA composite products according to any one of claims 2-4, 6 and 7, characterized in that, The recycling unit chamber includes a lower part of the recycling chamber (12), a wall body (13) and an upper part of the recycling chamber (14) that are spliced together. The liquid conveying pipeline is provided in the lower part of the recycling chamber (12), and the solvent spraying component is provided in the upper part of the recycling chamber (14).

9. The integrated recycling device for large-scale PMMA composite products according to claim 8, characterized in that, The recycling chamber includes one recycling unit chamber, and side wall panels (15) with flanges can be detachably connected to the front and rear end faces of the recycling unit chamber; or the recycling chamber includes at least two recycling unit chambers, and side wall panels (15) with flanges can be detachably connected to the outer end faces of the recycling unit chambers at both ends.

10. The integrated recycling device for large-scale PMMA composite products according to claim 9, characterized in that, Flanges are provided on the lower part of the recycling chamber (12), the wall body (13) and the upper part of the recycling chamber (14). The upper part of the recycling chamber (14) is of an "n" - shaped structure. The flanges on the upper part of the recycling chamber (14) include "n" - shaped flanges provided on the front and rear end faces of the "n" - shaped structure and "one" - shaped flange plates provided at the two lower ends of the "n" - shaped structure; the wall body (13) is of a rectangular plate structure, and the flanges on the wall body (13) include "mouth" - shaped flanges arranged around the edge of the wall body (13); the lower part of the recycling chamber (12) is of a "U" - shaped structure, and the flanges on the lower part of the recycling chamber (12) include "U" - shaped flanges provided on the front and rear end faces of the "U" - shaped structure and "one" - shaped flange plates provided at the two upper ends of the "U" - shaped structure; the "one" - shaped flange plates cooperate with the upper / lower sides of the "mouth" - shaped flanges; the front and rear sides of the "n" - shaped flanges, "U" - shaped flanges and "mouth" - shaped flanges respectively cooperate with the front and rear sides of the "n" - shaped flanges, "U" - shaped flanges and "mouth" - shaped flanges on the adjacent recycling unit chambers or the flange plates of the side wall panels (15).

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