Poly (propylene carbonate) granule treatment device and method
By forming a stable double-layer anti-sticking structure on the surface of polypropylene carbonate granules, the problem of granule adhesion during production and storage is solved, achieving a highly efficient and uniform anti-sticking effect, adapting to granules of different sizes and grades, and meeting the needs of large-scale production.
Patent Information
- Application Number
- CN202511927128.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-19
- Publication Date
- 2026-02-24
AI Technical Summary
Polypropylene carbonate granules are prone to agglomeration and sticking during production, storage and processing, which leads to poor feeding, equipment blockage and product molding defects. Existing anti-sticking treatment technologies are costly and have uneven effects.
By employing a layered synergistic coating technology, a stable double-layer anti-sticking structure is formed on the surface of polypropylene carbonate granules through multiple anti-sticking agent coating units. Anti-sticking agent No. 1 and anti-sticking agent No. 2 are used to form the bottom layer and the top layer, respectively, thus solving the problem of easy peeling off of a single anti-sticking agent.
It achieves a stable anti-sticking effect on polypropylene carbonate granules, reduces the adhesion rate, improves processing capacity and efficiency, adapts to granules of different grades and sizes, and meets the needs of large-scale production.
Smart Images
Figure CN121552545A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of polypropylene carbonate production technology, and particularly relates to a polypropylene carbonate granule processing device and method. Background Technology
[0002] Polypropylene carbonate (PPC) is a biodegradable polymer material with great development potential. However, its granules are prone to agglomeration and adhesion between particles during production, storage and processing due to the influence of molecular chain polarity, surface tension and environmental temperature. This leads to problems such as poor material feeding, blockage of processing equipment and product molding defects, which seriously limits its large-scale application in packaging, injection molding and other fields.
[0003] Currently, most existing anti-sticking treatment technologies involve blending and modifying PPC materials with other biodegradable materials using a mixing mill to improve their anti-sticking effect. However, these methods have high production costs, significantly reduce the quality of PPC materials, and also suffer from uneven anti-sticking effects, among other drawbacks.
[0004] Therefore, how to prevent polypropylene carbonate granules from sticking together has become a technical problem that the industry urgently needs to solve. Summary of the Invention
[0005] The present invention provides a polypropylene carbonate (PPC) granule processing device and method, which adopts layered synergistic coating to form a uniform and stable anti-sticking effect on the PPC granules.
[0006] The technical solution of the present invention includes: a polypropylene carbonate granule processing device, comprising: multiple anti-sticking agent coating units, wherein the multiple anti-sticking agent coating units operate at intervals, each anti-sticking agent coating unit comprising: a high-speed mixer, the high-speed mixer having a first inlet, a second inlet and a third inlet; a first anti-sticking agent regulating valve, the inlet of the first anti-sticking agent regulating valve being connected to a first anti-sticking agent storage tank via a pipeline, the outlet of the first anti-sticking agent regulating valve being connected to the first inlet via a pipeline, the first anti-sticking agent in the first anti-sticking agent storage tank being added to the high-speed mixer through the first inlet; and a second anti-sticking agent discharge valve, wherein the second... The inlet of the first anti-sticking agent discharge valve is connected to the second anti-sticking agent hopper via a pipeline. The outlet of the second anti-sticking agent discharge valve is connected to the second inlet via a pipeline. The second anti-sticking agent in the second anti-sticking agent hopper is added to the high-speed mixer through the second inlet. A discharge valve is also included, with its inlet connected to a rotary pump via a pipeline. The rotary pump supplies polypropylene carbonate granules to the discharge valve. The outlet of the discharge valve is connected to the third inlet via a pipeline. After the polypropylene carbonate granules and the first anti-sticking agent are added to the high-speed mixer for a specific time, the second anti-sticking agent is added to the high-speed mixer.
[0007] Preferably, multiple anti-sticking agent application units share the same No. 1 anti-sticking agent storage tank.
[0008] Preferably, the outlet pipeline of the No. 1 anti-sticking agent storage tank is connected to a No. 1 anti-sticking agent feeding pump, and the No. 1 anti-sticking agent feeding pump is connected to the No. 1 anti-sticking agent regulating valve of multiple anti-sticking agent coating units.
[0009] Preferably, each of the plurality of anti-sticking agent coating units includes a second anti-sticking agent hopper.
[0010] Preferably, the outlet pipeline of the second anti-sticking agent silo is equipped with a second anti-sticking agent feeding pump, the outlet of the second anti-sticking agent feeding pump is connected to a second anti-sticking agent metering silo via a pipeline, and the outlet of the second anti-sticking agent metering silo is connected to the second anti-sticking agent discharge valve via a pipeline.
[0011] Preferably, the second anti-sticking agent feeding pump is a screw conveyor pump, the second anti-sticking agent discharge valve adds a set amount of the second anti-sticking agent to the high-speed mixer; the first anti-sticking agent regulating valve adds a set amount of the first anti-sticking agent to the high-speed mixer.
[0012] Preferably, the number of anti-sticking agent coating units is three, and the three anti-sticking agent coating units share the same feed rotary pump.
[0013] Preferably, a first conveyor belt is provided below the outlet of the rotary pump, a metering chamber is provided below one end of the first conveyor belt, a second conveyor belt is provided below the other end of the first conveyor belt, metering chambers are provided below both ends of the second conveyor belt, and the outlet of the metering chamber is connected to the discharge valve through a pipeline.
[0014] Preferably, the first anti-sticking agent is at least one of silicone oil, glycerin, and propylene glycol, and the second anti-sticking agent is at least one of calcium carbonate, titanium dioxide, and diatomaceous earth.
[0015] This invention also provides a method for processing polypropylene carbonate granules, including the aforementioned polypropylene carbonate granule processing device. The processing steps of the polypropylene carbonate granules include: S1 adding a set amount of polypropylene carbonate granules to a high-speed mixer using a discharge valve; S2 adding a set amount of anti-sticking agent (number one) to the high-speed mixer using a first anti-sticking agent regulating valve, and stirring with the polypropylene carbonate granules in the high-speed mixer for a set time to form a uniform bottom layer of polypropylene carbonate granules; S3 adding a set amount of second anti-sticking agent (number two) to the high-speed mixer using a second anti-sticking agent discharge valve, and stirring with the uniform bottom layer of polypropylene carbonate granules in the high-speed mixer for a set time to form a uniform surface layer of anti-sticking polypropylene carbonate granules; repeating steps S1-S3 at set intervals in different anti-sticking agent coating units.
[0016] The beneficial effects of this invention are as follows: By designing multiple intermittently operating anti-sticking agent coating units, continuous anti-sticking treatment of polypropylene carbonate granules can be achieved, improving the processing capacity and efficiency of the entire device; simultaneously, a high-speed mixer is designed in the anti-sticking agent coating unit, and three inlets are designed in the high-speed mixer. Polypropylene carbonate granules, anti-sticking agent No. 1, and anti-sticking agent No. 2 are added to the high-speed mixer through the three inlets respectively. The dosage of anti-sticking agent No. 1 and the amount of polypropylene carbonate granules are controlled by the regulating valve and the discharge valve of anti-sticking agent No. 1. After the two are mixed evenly in the high-speed mixer, a certain amount of anti-sticking agent No. 2 is added through the discharge valve of anti-sticking agent No. 2. Through the sequential addition of anti-sticking agent No. 1 and anti-sticking agent No. 2, a bottom layer and a surface layer anti-sticking structure are formed on the outside of the polypropylene carbonate granules. Through the synergistic effect of bottom layer anchoring and surface layer anti-sticking, the problem of easy peeling and anti-sticking failure of a single anti-sticking agent coating is solved, and a stable double-layer anti-sticking structure is formed on the polypropylene carbonate granules. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of this embodiment.
[0019] in:
[0020] 1. High-speed mixer one; 11. Anti-sticking agent bin one; 12. Anti-sticking agent feeding pump one; 13. Anti-sticking agent metering bin one; 14. Anti-sticking agent discharge valve one; 15. Metering bin one; 16. Discharge valve one; 17. Anti-sticking agent regulating valve one.
[0021] 2. High-speed mixer II; 21. Anti-sticking agent bin II; 22. Anti-sticking agent feed pump II; 23. Anti-sticking agent metering bin II; 24. Anti-sticking agent discharge valve II; 25. Metering bin II; 26. Discharge valve II; 27. Anti-sticking agent regulating valve II.
[0022] 3. High-speed mixer three; 31. No. 2 anti-sticking agent silo three; 32. No. 2 anti-sticking agent feeding pump three; 33. No. 2 anti-sticking agent metering silo three; 34. No. 2 anti-sticking agent discharge valve three; 35. Metering silo three; 36. Discharge valve three; 37. No. 1 anti-sticking agent regulating valve three.
[0023] 100. Feeding rotary pump; 101. Conveyor belt one; 102. Conveyor belt two; 103. Conveyor belt three; 104. Packaging silo one; 105. Packaging silo two.
[0024] 200. Anti-sticking agent storage tank No. 1; 201. Anti-sticking agent feeding pump No. 1. Detailed Implementation
[0025] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0026] In this document, terms such as "above," "below," "left," "right," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, these positional relationships may change; therefore, they should not be construed as absolute limitations on the scope of protection. Furthermore, relational terms such as "first" and "second" are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components. In addition, in embodiments of this invention, "above," "below," etc., include the number itself.
[0027] The PPC granule processing apparatus and method of this embodiment address the problem of particle agglomeration and adhesion in existing PPC granules, which adversely affects material production, transportation, and performance. Therefore, this embodiment proposes an anti-agglomeration treatment for the PPC granules.
[0028] Existing conventional coating equipment, such as spiral mixers, is designed for powder or flake materials. When used directly for processing PPC granules, the differences in material morphology can easily lead to problems such as PPC granule agglomeration, waste of anti-sticking agent, and coating peeling.
[0029] To address the aforementioned practical difficulties, this embodiment proposes a surface-layer coating method for PPC granules to create a stable and uniform anti-sticking effect on the surface of the granular PPC material.
[0030] Reference Figure 1 On the one hand, this embodiment provides a polypropylene carbonate granule processing device, including multiple anti-sticking agent coating units. The multiple anti-sticking agent coating units operate at intervals. By utilizing the multiple anti-sticking agent coating units that operate at intervals, continuous anti-sticking treatment of PPC granules can be achieved, thereby improving the anti-sticking treatment capability and efficiency of the entire device for PPC granules.
[0031] The anti-sticking agent coating unit includes a high-speed mixer with a first inlet, a second inlet, and a third inlet. These three inlets allow for the independent addition of PPC granules, anti-sticking agent type one, and anti-sticking agent type two, avoiding interference caused by sharing a single feed port. Simultaneously, the high-speed mixer ensures uniform mixing of the PPC granules with the anti-sticking agents, promoting a uniform anti-sticking effect on the PPC granule surface.
[0032] The inlet of the No. 1 anti-sticking agent regulating valve is connected to the No. 1 anti-sticking agent storage tank 200 via a pipeline, and the outlet of the No. 1 anti-sticking agent regulating valve is connected to the first inlet via a pipeline. The No. 1 anti-sticking agent in the No. 1 anti-sticking agent storage tank 200 is added to the high-speed mixer through the first inlet. Using the No. 1 anti-sticking agent regulating valve, the No. 1 anti-sticking agent in the No. 1 anti-sticking agent storage tank 200 can be added to the high-speed mixer according to the required set amount, which is conducive to achieving precise matching of the anti-sticking agent coating amount. This allows for the formation of a stable and uniform anti-sticking effect on PPC granules, while also being adaptable to anti-sticking coating of PPC granules of different grades and particle sizes.
[0033] The inlet of the No. 2 anti-sticking agent discharge valve is connected to the No. 2 anti-sticking agent hopper via a pipeline, and the outlet of the No. 2 anti-sticking agent discharge valve is connected to the second inlet via a pipeline. The No. 2 anti-sticking agent in the No. 2 anti-sticking agent hopper is added to the high-speed mixer through the second inlet. In conjunction with this, the No. 2 anti-sticking agent discharge valve allows the No. 2 anti-sticking agent in the No. 2 anti-sticking agent hopper to be added to the high-speed mixer in the required set amount, facilitating precise matching of the anti-sticking agent coating amount. This ensures a stable and uniform anti-sticking effect on PPC granules while adapting to anti-sticking coating of different grades and particle sizes of PPC granules.
[0034] The inlet of the discharge valve is connected to a rotary pump 100 via a pipeline. This rotary pump 100 supplies polypropylene carbonate granules to the discharge valve, and the outlet of the discharge valve is connected to a third inlet via a pipeline. Simultaneously, using the discharge valve, the PPC granules supplied by the rotary pump 100 are added to a high-speed mixer in the required set amount. This, combined with the addition of anti-sticking agents one and two, facilitates precise matching of the anti-sticking agent coating amount on the PPC granule surface. This ensures a stable and uniform anti-sticking effect on the PPC granules while adapting to anti-sticking coatings of different grades and particle sizes of PPC granules.
[0035] After polypropylene carbonate granules and anti-sticking agent No. 1 are added to the high-speed mixer for a specific time, anti-sticking agent No. 2 is then added. In other words, the two anti-sticking agents are added sequentially to the high-speed mixer to form a layered anti-sticking structure on the surface of the PPC granules. Anti-sticking agent No. 1 forms the bottom layer, and anti-sticking agent No. 2 forms the top layer. Through the synergistic effect of bottom layer anchoring and top layer anti-sticking, the problem of easy peeling and anti-sticking failure of single anti-sticking agent coatings is solved, forming a structurally stable double-layer anti-sticking system in the PPC granules.
[0036] Specifically, multiple anti-sticking agent application units share the same No. 1 anti-sticking agent storage tank 200. The outlet pipeline of the No. 1 anti-sticking agent storage tank 200 is connected to a No. 1 anti-sticking agent feeding pump 201, which is connected to the No. 1 anti-sticking agent regulating valve of multiple anti-sticking agent application units. In this way, multiple anti-sticking agent application units share the same No. 1 anti-sticking agent storage tank 200 and No. 1 anti-sticking agent feeding pump 201, which facilitates the coordinated control of the entire anti-sticking treatment device and simplifies the equipment complexity of the entire device.
[0037] Multiple anti-sticking agent coating units include their own secondary anti-sticking agent silos. Specifically, the outlet pipeline of the secondary anti-sticking agent silo is equipped with a secondary anti-sticking agent feed pump. The outlet of the secondary anti-sticking agent feed pump is connected to a secondary anti-sticking agent metering silo via a pipeline. The outlet of the secondary anti-sticking agent metering silo is connected to a secondary anti-sticking agent discharge valve via a pipeline. Each anti-sticking agent coating unit is designed with a secondary anti-sticking agent silo, a secondary anti-sticking agent feed pump, a secondary anti-sticking agent metering silo, and a secondary anti-sticking agent discharge valve, enabling precise control of the added secondary anti-sticking agent and improving the anti-sticking treatment effect on PPC granules.
[0038] Specifically, the No. 2 anti-sticking agent feeding pump is a screw conveyor pump, and the No. 2 anti-sticking agent discharge valve adds the set amount of No. 2 anti-sticking agent to the high-speed mixer; the No. 1 anti-sticking agent regulating valve adds the set amount of No. 1 anti-sticking agent to the high-speed mixer, so as to achieve precise feeding of No. 1 and No. 2 anti-sticking agents. Through high-precision metering control, the precise matching of anti-sticking agent coating amount is achieved, improving the adaptability of anti-sticking coating for PPC granules of different grades and particle sizes.
[0039] Reference Figure 1There are three anti-sticking agent coating units, all sharing the same rotary pump 100. A conveyor belt 101 is located below the outlet of the rotary pump 100. A metering bin is located below one end of conveyor belt 101, and a conveyor belt 102 is located below the other end of conveyor belt 101. Metering bins are located at both ends of conveyor belt 102, and the outlets of the metering bins are connected to a discharge valve via pipelines. The shared PPC granule feeding rotary pump 100 among the three anti-sticking agent coating units improves the coordination of the entire anti-sticking treatment device. Furthermore, the use of conveyor belts 101 and 102 to supply PPC granules to the three anti-sticking agent coating units facilitates precise control of PPC granule feeding within the three units, and the structure is ingenious.
[0040] Specifically, a metering bin 15 is installed below one end of the conveyor belt 101. The outlet pipeline of the metering bin 15 is designed with a discharge valve 16 to achieve precise control of the PPC granules in the first anti-sticking agent coating unit, that is, to add a set amount of PPC granules to the high-speed mixer 1.
[0041] The first anti-stick coating unit will be described in detail as an example.
[0042] The first anti-sticking agent coating unit includes a high-speed mixer-1. PPC granules are conveyed from the feed rotary pump 100 to the conveyor belt 101 and then enter the metering bin 15. After that, the required amount of PPC granules is added to the high-speed mixer-1 through the discharge valve 16.
[0043] The No. 1 anti-sticking agent is transported from the No. 1 anti-sticking agent storage tank 200 to the No. 1 anti-sticking agent regulating valve 17 under the action of the No. 1 anti-sticking agent feeding pump 201, and added to the high-speed mixer 1 according to the required dosage of the No. 1 anti-sticking agent.
[0044] Anti-sticking agent No. 2 enters anti-sticking agent metering chamber No. 2 from anti-sticking agent hopper No. 2 11 under the action of anti-sticking agent feeding pump No. 2 12. Then, according to the required dosage of anti-sticking agent No. 2, it is added to high-speed mixer No. 1 through anti-sticking agent discharge valve No. 2 14.
[0045] The specific order of addition is as follows: first, add the PPC granules to high-speed mixer 1, then add anti-sticking agent No. 1. After mixing the two evenly, add anti-sticking agent No. 2. During the addition process, the amounts of PPC granules, anti-sticking agent No. 1, and anti-sticking agent No. 2 are precisely controlled. Through a high-precision metering system linked to the granule conveying rate, precise matching of the anti-sticking agent coating amount is achieved, adaptable to anti-sticking coating of polypropylene carbonate materials of different grades and particle sizes. Furthermore, using anti-sticking agent No. 1 as the bottom layer and anti-sticking agent No. 2 as the surface layer, the sequential addition of the two anti-sticking agents forms a two-agent layered synergistic coating. Through the synergistic effect of bottom layer anchoring and surface layer anti-sticking, the problem of easy peeling and anti-sticking failure of a single anti-sticking agent coating is solved, forming a structurally stable two-layer anti-sticking system. In addition, the anti-sticking treatment device of this embodiment is applicable to polypropylene carbonate granules of various particle sizes, achieving uniform anti-sticking agent coating on the granule surface, especially suitable for PPC granules with a particle size of 1-5mm.
[0046] Similar to the first anti-sticking agent coating unit, the second anti-sticking agent coating unit has a high-speed mixer 2. The first anti-sticking agent is added to the high-speed mixer 2 from the first anti-sticking agent storage tank 200 under the action of the first anti-sticking agent feeding pump 201 through the first anti-sticking agent regulating 27. The second anti-sticking agent is added to the second anti-sticking agent metering bin 23 from the second anti-sticking agent hopper 21 under the action of the second anti-sticking agent feeding pump 222, and then added to the high-speed mixer 2 from the second anti-sticking agent discharge valve 24. The PPC granules fall into the conveyor belt 101 from the feed rotary pump 100, then enter the conveyor belt 102, then enter the metering bin 25, and finally enter the high-speed mixer 2 from the discharge valve 26.
[0047] The third anti-sticking agent coating unit has a high-speed mixer 3. The first anti-sticking agent is added to the high-speed mixer 3 from the first anti-sticking agent storage tank 200 under the action of the first anti-sticking agent feeding pump 201 through the first anti-sticking agent regulating 37. The second anti-sticking agent is added to the second anti-sticking agent metering bin 33 from the second anti-sticking agent silo 31 under the action of the second anti-sticking agent feeding pump 32, and then added to the high-speed mixer 3 from the second anti-sticking agent discharge valve 34. The PPC granules fall into the conveyor belt 101 from the feed rotary pump 100, then enter the conveyor belt 2 102, then enter the metering bin 35, and finally enter the high-speed mixer 3 from the discharge valve 36.
[0048] Specifically, before operation, the PPC pellet processing device in this embodiment has the first anti-sticking agent prepared in the first anti-sticking agent storage tank 200, and the first anti-sticking agent feeding pump 201 is in reflux operation. The second anti-sticking agent is prepared in the second anti-sticking agent silos 11, 21, and 31, and is fed into the second anti-sticking agent metering silo by their respective second anti-sticking agent feeding pumps. The high-speed mixers 1, 2, and 3, as well as the conveyor belts 101 and 102 are in operation and the belts are running in the correct direction.
[0049] In the anti-sticking coating treatment of PPC granules, the operating interval time of the three high-speed mixers 1, 2, and 3 is set according to their coating times to achieve mutual connection and ensure the continuous operation of the entire coating process.
[0050] Specifically, a conveyor belt 103 is also designed. The PPC granules processed by high-speed mixer 1, high-speed mixer 2, and high-speed mixer 3 enter the conveyor belt 103 and are then stored in packaging silos 104 and 215 under the action of the conveyor belt 103.
[0051] Anti-stick agent No. 1 is at least one of silicone oil, glycerin, and propylene glycol, with silicone oil being the preferred choice; anti-stick agent No. 2 is at least one of calcium carbonate, titanium dioxide, and diatomaceous earth, with calcium carbonate being the preferred choice.
[0052] In this embodiment, based on the total weight of the coated polypropylene carbonate, the weight percentage of anti-stick agent No. 1 is 2-3% and the weight percentage of anti-stick agent No. 2 is 4-5%.
[0053] Examples and comparative examples were set up for the above parameters respectively.
[0054] Example 1: The first anti-stick agent is silicone oil, and the second anti-stick agent is calcium carbonate. Based on the total weight of the polypropylene carbonate after coating, the weight percentage of the silicone oil is 2% and the weight percentage of the calcium carbonate is 5%.
[0055] Example 2: The only difference from Example 1 is that, based on the total weight of the coated polypropylene carbonate, the weight percentage of the silicone oil is 2.5% and the weight percentage of calcium carbonate is 4.5%.
[0056] Comparative Example
[0057] Comparative Example 1: The only difference from Example 1 is that it does not contain silicone oil.
[0058] Comparative Example 2: The only difference from Example 1 is that calcium carbonate is not present.
[0059] Comparative Example 3: The only difference from Example 1 is that, based on the total weight of the coated polypropylene carbonate, the weight percentage of the silicone oil is 3.5% and the weight percentage of calcium carbonate is 5.5%.
[0060] Evaluation Test:
[0061] Adhesion rate evaluation: Take 3 portions of polypropylene carbonate material with the same formulation after coating, each portion weighing 1 kg, and store them at 40℃ and 1 MPaG for 72 hours respectively. Calculate the percentage of the weight of the adhesive material in the evaluated material and take the average value.
[0062] Uniformity evaluation: After the coated polypropylene carbonate material is stored at 40℃ and 1MPaG for 72 hours, the uniformity of the coating particle distribution is observed by a surface roughness tester and scanning electron microscope to determine whether there is agglomeration or uneven distribution and to evaluate the surface smoothness.
[0063] Test results:
[0064] Adhesion rate Uniformity Example 1 0 96％ Example 2 0 97％ Comparative Example 1 80％ 63％％ Comparative Example 2 62％ 61％ Comparative Example 3 35％ 88％
[0065] The PPC granule processing device in this embodiment, through a layered synergistic coating process, achieves a adhesion rate of ≤1% for polypropylene carbonate granules after storage at 40°C for 72 hours, reducing adhesion by more than 60% compared to traditional single anti-sticking processes. Furthermore, the anti-sticking effect remains undiminished during subsequent high-temperature and high-pressure processing such as extrusion and injection molding, ensuring processing continuity. Additionally, with the aid of dedicated coating facilities, the material coating uniformity can reach 95%. Moreover, the amount of anti-sticking agent and the coating rate can be precisely adjusted to adapt to different grades and particle sizes of granules, meeting the diverse needs of large-scale production.
[0066] On the other hand, this embodiment also provides a method for processing polypropylene carbonate granules, including the above-mentioned polypropylene carbonate granule processing apparatus, wherein the processing steps of the polypropylene carbonate granules include:
[0067] S1 uses a discharge valve to add a set amount of polypropylene carbonate granules into the high-speed mixer;
[0068] S2 uses the No. 1 anti-sticking agent regulating valve to add the set amount of No. 1 anti-sticking agent to the high-speed mixer, and mixes it with the polypropylene carbonate granules in the high-speed mixer for a set time to form a bottom layer of uniform polypropylene carbonate granules.
[0069] S3 uses the No. 2 anti-sticking agent discharge valve to add the set amount of No. 2 anti-sticking agent to the high-speed mixer, and stirs it with the uniform polypropylene carbonate particles at the bottom of the high-speed mixer for a set time to form uniform anti-sticking polypropylene carbonate particles on the surface.
[0070] Steps S1-S3 are repeated at different anti-stick coating units according to the set interval time.
[0071] Where the embodiments do not contradict each other, at least some of the technical solutions in each embodiment can be recombine to form the essential technical solution of the present invention. Of course, the embodiments can also reference or include each other. Furthermore, it should be noted that adaptive adjustments and modifications made by those skilled in the art when recombinating the technical means described in the embodiments will also fall within the protection scope of the present invention.
[0072] The technical principles of the present invention have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, those skilled in the art can conceive of other specific embodiments or equivalent substitutions of the present invention without creative effort, and all such embodiments will fall within the scope of protection of the present invention.
Claims
1. A polypropylene carbonate granule processing device, characterized in that, include: Multiple anti-adhesive coating units, wherein the multiple anti-adhesive coating units operate at intervals, each anti-adhesive coating unit comprising: A high-speed mixer, wherein the high-speed mixer is provided with a first inlet, a second inlet and a third inlet; The first anti-sticking agent regulating valve has an inlet connected to a first anti-sticking agent storage tank via a pipeline, and an outlet connected to the first inlet via a pipeline. The first anti-sticking agent in the first anti-sticking agent storage tank is added to the high-speed mixer through the first inlet. The No. 2 anti-sticking agent discharge valve has an inlet connected to a No. 2 anti-sticking agent hopper via a pipeline, and an outlet connected to a second inlet via a pipeline. The No. 2 anti-sticking agent in the No. 2 anti-sticking agent hopper is added to the high-speed mixer through the second inlet. A discharge valve is provided, the inlet of which is connected to a rotary pump via a pipeline. The rotary pump supplies polypropylene carbonate granules to the discharge valve, and the outlet of the discharge valve is connected to the third inlet via a pipeline. After the polypropylene carbonate granules and the first anti-sticking agent are added to the high-speed mixer for a specific time, the second anti-sticking agent is added to the high-speed mixer.
2. The polypropylene carbonate granule processing device according to claim 1, characterized in that: Multiple anti-sticking agent application units share the same No. 1 anti-sticking agent storage tank.
3. The polypropylene carbonate granule processing device according to claim 2, characterized in that: The outlet pipeline of the No. 1 anti-sticking agent storage tank is connected to the No. 1 anti-sticking agent feeding pump, and the No. 1 anti-sticking agent feeding pump is connected to the No. 1 anti-sticking agent regulating valve of multiple anti-sticking agent coating units.
4. A polypropylene carbonate granule processing device according to any one of claims 1-3, characterized in that: Each of the aforementioned anti-sticking agent coating units includes its own second anti-sticking agent hopper.
5. The polypropylene carbonate granule processing device according to claim 4, characterized in that: The outlet pipeline of the No. 2 anti-sticking agent silo is equipped with a No. 2 anti-sticking agent feeding pump. The outlet of the No. 2 anti-sticking agent feeding pump is connected to the No. 2 anti-sticking agent metering silo via a pipeline. The outlet of the No. 2 anti-sticking agent metering silo is connected to the No. 2 anti-sticking agent discharge valve via a pipeline.
6. The polypropylene carbonate granule processing device according to claim 5, characterized in that: The second anti-sticking agent feeding pump is a screw conveyor pump, and the second anti-sticking agent discharge valve adds a set amount of the second anti-sticking agent to the high-speed mixer; the first anti-sticking agent regulating valve adds a set amount of the first anti-sticking agent to the high-speed mixer.
7. The polypropylene carbonate granule processing device according to claim 1, characterized in that: The number of anti-sticking agent coating units is three, and the three anti-sticking agent coating units share the same feed rotary pump.
8. The polypropylene carbonate granule processing device according to claim 7, characterized in that: Below the outlet of the rotary pump, there is a first conveyor belt. Below one end of the first conveyor belt, there is a metering chamber. Below the other end of the first conveyor belt, there is a second conveyor belt. Below both ends of the second conveyor belt, there are metering chambers. The outlet of the metering chamber is connected to the discharge valve through a pipeline.
9. The polypropylene carbonate granule processing device according to claim 1, characterized in that: The first anti-sticking agent is at least one of silicone oil, glycerin, and propylene glycol, and the second anti-sticking agent is at least one of calcium carbonate, titanium dioxide, and diatomaceous earth.
10. A method for processing polypropylene carbonate granules, characterized in that: The polypropylene carbonate pellet processing apparatus according to any one of claims 1-9, wherein the processing steps of the polypropylene carbonate pellets include: S1 uses a discharge valve to add a set amount of polypropylene carbonate granules into the high-speed mixer; S2 uses the No. 1 anti-sticking agent regulating valve to add the set amount of No. 1 anti-sticking agent to the high-speed mixer, and mixes it with the polypropylene carbonate granules in the high-speed mixer for a set time to form a bottom layer of uniform polypropylene carbonate granules. S3 uses the No. 2 anti-sticking agent discharge valve to add the set amount of No. 2 anti-sticking agent to the high-speed mixer, and stirs it with the uniform polypropylene carbonate particles at the bottom of the high-speed mixer for a set time to form uniform anti-sticking polypropylene carbonate particles on the surface. Steps S1-S3 are repeated at different anti-stick coating units according to the set interval time.