Degradation reaction device for degradable green plastic package

Abstract

This utility model discloses a degradation reaction device for biodegradable green plastic packaging, including a fixed outer shell frame and a glass vessel placed inside it. A support plate is fixedly connected to the lower part of the fixed outer shell frame, and the glass vessel is placed on the upper part of the support plate. A motor is installed on the top of the glass vessel, and a stirring rod is fixedly connected to the output end of the motor. A push stirring paddle, a shearing stirring paddle, and a scraping stirring paddle are fixedly connected to the outer wall of the stirring rod from top to bottom. The top of the glass vessel has a feeding port and an air injection port, and the bottom of the glass vessel has a discharge port with a discharge valve fixedly connected to it. A liquid injection pipe is installed on the side of the glass vessel, and a liquid injection valve is fixedly connected to the liquid injection pipe. A heating layer is provided on the outer wall of the glass vessel. The advantages are that it can effectively prevent the occurrence of material sedimentation, agglomeration, clumping, stratification, and wall adhesion at the bottom, making the degradation plastic particles more evenly distributed in the glass vessel, effectively improving the uniformity of microbial growth, and thus accelerating the degradation rate of the plastic particles.

Description

Technical Field

[0001] This utility model belongs to the technical field of plastic degradation reaction devices, specifically relating to a degradation reaction device for degradable green plastic packaging. Background Technology

[0002] Biodegradable plastic materials are those that can degrade into environmentally harmless substances under certain environmental conditions after use. With the successive implementation of national "plastic restriction orders," biodegradable materials have been widely used to replace traditional non-biodegradable materials in many consumer goods sectors, such as food contact materials, logistics packaging, and agricultural films. In 2020, with the release of the "Opinions on Further Strengthening the Governance of Plastic Pollution," it was clearly stated that by the end of 2025, the postal and express delivery services nationwide will be prohibited from using non-biodegradable plastic packaging bags, plastic tape, and disposable plastic woven bags.

[0003] Currently, research on biodegradable plastic packaging products widely used in China mainly focuses on the preparation process of degradable materials, with a lack of research and development on the degradation process itself. Furthermore, the monitoring of toxic substances during degradation and the resulting environmental risks urgently need further research and evaluation. Additionally, the degradation equipment currently used for degradable plastics generally has small capacity and unreasonable stirring design, leading to uneven material distribution during degradation, and problems such as stratification, localized clumping, and agglomeration, resulting in low degradation efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a degradation reaction device for biodegradable green plastic packaging, in order to solve the problems of small capacity of existing degradation equipment, unreasonable stirring design, uneven material distribution during degradation, easy generation of stratification, local agglomeration, and low degradation reaction efficiency.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a degradation reaction device for biodegradable green plastic packaging, comprising a fixed outer frame and a glass vessel placed inside it. A support plate is fixedly connected to the lower part of the fixed outer frame, and the glass vessel is placed on the upper part of the support plate. A motor is installed on the top of the glass vessel, and a stirring rod is fixedly connected to the output end of the motor. A push stirring paddle, a shearing stirring paddle, and a scraping stirring paddle are fixedly connected to the outer wall of the stirring rod from top to bottom. A feeding port and an air injection port are provided on the top of the glass vessel, and a discharge port is provided at the bottom of the glass vessel. A discharge valve is fixedly connected to the discharge port. A liquid injection pipe is provided on the side of the glass vessel, and a liquid injection valve is fixedly connected to the liquid injection pipe. A heating layer is provided on the outer wall of the glass vessel, and an electric heating wire is provided inside the heating layer. A monitoring rod is fixedly connected inside the glass vessel, and a temperature sensor, a humidity sensor, and a pH meter are respectively provided at the end of the monitoring rod. A control panel is provided on the top of the fixed outer frame, and the discharge valve, the liquid injection valve, the electric heating wire, the temperature sensor, the humidity sensor, and the pH meter are all electrically connected to the control panel.

[0006] Preferably, the inner wall of the glass reactor is provided with at least three toothed baffles.

[0007] Preferably, the angle between the toothed baffle and the inner wall of the glass reactor is 60°.

[0008] Preferably, a PVC support base is provided between the glass vessel and the support plate.

[0009] Preferably, an observation window is provided on the outer wall of the glass reactor.

[0010] Preferably, the spacing between the push agitator, the shear agitator, and the scraper agitator is the same.

[0011] The advantages of this utility model are: 1. The glass reactor has the characteristics of high chemical stability, good heat insulation, high mechanical strength, and cleanliness. It can avoid problems such as corrosion, heat loss, and leakage during the degradation reaction. It effectively ensures the stability, safety and pollution-free operation of the temperature, humidity, pH value and gas environment of the culture soil during the degradation process. This makes the growth of microorganisms and the biodegradation process efficient and controllable. The injection pipe and injection valve can effectively ensure the humidity requirements inside the glass reactor. When the humidity sensor detects that the humidity is not up to standard, the control panel activates the injection valve to add external water into the glass reactor through the injection pipe. 2. A heating layer is provided on the outer wall of the glass reactor, which can control the degradation temperature inside the glass reactor, resulting in environmental protection and energy-saving benefits. At the same time, it can make the temperature distribution inside the glass reactor more uniform and improve the consistency of microbial growth. 3. The stirring rod of the degradation reaction device is fixedly connected from top to bottom with a push stirring paddle, a shear stirring paddle and a scraping stirring paddle. Together with the toothed baffle on the inner wall of the reaction vessel, it can effectively prevent the occurrence of material sedimentation, agglomeration, clumping, stratification and wall adhesion at the bottom. This makes the degradation plastic particles and microbial materials more evenly distributed in the glass vessel, effectively improving the uniformity of microbial growth and thus accelerating the degradation rate of the degradation plastic particles. 4. The degradation reaction device is scientifically and rationally designed. No toxic or harmful gases or liquids are discharged during the degradation process. The residual residue after degradation has low content of toxic and harmful substances such as plasticizers and heavy metals, resulting in good environmental protection. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] The meanings of the reference numerals in the attached drawings are as follows: 1. Fixed outer frame; 2. Glass vessel; 3. Support plate; 4. Motor; 5. Stirring rod; 6. Pressing stirring paddle; 7. Shearing stirring paddle; 8. Scraping stirring paddle; 9. Feeding port; 10. Air injection port; 11. Discharge port; 12. Liquid injection pipe; 13. Liquid injection valve; 14. Heating layer; 15. Electric heating wire; 16. Monitoring rod; 17. Temperature sensor; 18. Humidity sensor; 19. pH meter; 20. Control panel; 21. Toothed baffle; 22. PVC base; 23. Observation window; 24. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1The illustrated degradation reaction device for biodegradable green plastic packaging includes a fixed outer frame 1 and a glass vessel 2 placed inside it. A support plate 3 is fixedly connected to the lower part of the fixed outer frame 1. The glass vessel 2 is positioned on top of the support plate 3, and a motor 4 is mounted on top of the glass vessel 2. A stirring rod 5 is fixedly connected to the output end of the motor 4. From top to bottom, a pressure stirring paddle 6, a shearing stirring paddle 7, and a scraping stirring paddle 8 are fixedly connected to the outer wall of the stirring rod 5. The pressure stirring paddle 6 can efficiently and powerfully mix the materials, effectively solving the problem of stratification of lighter materials during the degradation process, making the material... The material is more evenly distributed in the glass reactor 2. The shearing agitator 7 can break up agglomerated and lumpy materials, and the scraping agitator 8 can effectively scrape off the material at the bottom of the reactor to prevent material sedimentation. The top of the glass reactor 2 is equipped with a feeding port 9 and an air injection port 10. During the operation of the degradation reaction device, compressed air can be injected into the glass reactor 2 through the air injection port 10. At the same time, when there is a lot of gas in the glass reactor 2, the excess gas inside can also be discharged through the air injection port 10. The bottom of the glass reactor 2 is equipped with a discharge port 11, and a discharge valve 12 is fixedly connected to the discharge port 11. The side of the glass reactor 2... The glass vessel 2 is equipped with a liquid injection pipe 13, to which a liquid injection valve 14 is fixedly connected. A heating layer 15 is provided on the outer wall of the glass vessel 2, and an electric heating wire 16 is installed inside the heating layer 15. A monitoring rod 17 is fixedly connected inside the glass vessel 2. A temperature sensor 18, a humidity sensor 19, and a pH meter 20 are respectively installed at the ends of the monitoring rod 17. The temperature sensor 18, humidity sensor 19, and pH meter 20 detect the temperature, humidity, and pH value inside the glass vessel 2, respectively, and transmit these values ​​to the control panel 21 via wires. When the temperature is lower or higher than a preset value, the control panel 21 will control the flow. The control panel 21 controls the start and stop of the electric heating wire 16. When the humidity is lower or higher than the preset value, the control panel 21 will control the start and stop of the liquid injection valve 14 to inject an appropriate amount of water into the glass reactor 2 to replenish the humidity in the degradation reaction device. The pH meter 20 monitors the pH value of the mixture in real time and displays it through the control panel 21 for easy observation by the staff. The control panel 21 is located on the top of the fixed housing frame 1. The discharge valve 12, liquid injection valve 14, electric heating wire 16, temperature sensor 18, humidity sensor 19 and pH meter 20 are all electrically connected to the control panel 21.

[0016] To assist in breaking up agglomerated and clump-forming materials, at least three toothed baffles 22 are provided on the inner wall of the glass reactor 2, and the angle between the toothed baffles 22 and the inner wall of the glass reactor 2 is 60°.

[0017] In order to reduce vibration during the reaction process of glass reactor 2 and improve the stability of glass reactor 2, a PVC support base 23 is provided between glass reactor 2 and support plate 3.

[0018] To facilitate staff observation of the material inside the glass reactor 2, an observation window 24 is provided on the outer wall of the glass reactor 2.

[0019] To improve the mixing effect of the three-layer agitator on the material, the spacing between the push agitator 6, the shear agitator 7 and the scraper agitator 8 is set to be the same.

[0020] The working process of this utility model is as follows: An example using a reaction apparatus with a volume of 0.5 m³; 1. Preparation of raw materials for degradation reaction: The reaction materials are a uniformly mixed biodegradable green plastic packaging, culture soil, and cultured bacteria. The biodegradable green plastic packaging is pre-separated and crushed into block fragments with a particle size of 10±5mm, and the amount added to the equipment is 32kg. The culture soil has a ratio of vermiculite:nutrient soil:deionized water:nutrients = 4:11:7:0.08, and the total amount added is 220kg. The cultured bacteria have a ratio of Aspergillus niger:Penicillium polonii:Bacillus thuringiensis = 2:1:1, and the total bacterial concentration is 1.5×10⁻⁶. 7 CFU / pcs, with an addition volume of 12L.

[0021] 2. Loading and degradation reaction device parameter settings: The above-mentioned mixed material is added into the degradation reaction device through the feed port 9. The parameters of the device are adjusted through the control panel 21 as follows: the pH value of the reaction is adjusted to 7.0-9.0; the temperature is controlled at 40±5℃; and the moisture content of the reaction mixture is controlled at 50±5%.

[0022] 3. Degradation process and stirring rod adjustment When staff observe through observation window 24 that the material in glass reactor 2 exhibits bottom sedimentation, agglomeration, clumping, stratification, or sticking to the walls, they activate motor 4 via control panel 21. Under the action of motor 4, stirring rod 5 begins to rotate, simultaneously driving the push-pump stirring paddle 6, shearing stirring paddle 7, and scraping stirring paddle 8 to rotate. Push-pump stirring paddle 6 efficiently and powerfully mixes the material, effectively solving the stratification problem of lighter materials during degradation, resulting in a more uniform distribution of material in glass reactor 2. Shearing stirring paddle 7 breaks up agglomerated and clumped materials, while scraping stirring paddle 8 effectively scrapes away material from the bottom of the reactor, preventing sedimentation. Combined with the toothed baffle 22 on the inner wall of glass reactor 2, this quickly disperses the material, making the mixing more uniform. This effectively ensures a more even distribution of degradable plastic particles and microbial materials in the glass reactor, improving the uniformity of microbial growth and accelerating the degradation rate of the plastic particles.

[0023] 4. End of reaction and cleaning of glass reactor 2 After the degradation reaction is complete, the residue in the glass reactor 2 is discharged by opening the discharge valve 12. After discharge, the discharge valve 12 is closed, the liquid injection valve 14 is started, and clean water is injected into the glass reactor 2. Then the motor 4 is started, and the inside of the glass reactor 2 is cleaned by the cooperation of the push stirring paddle 6, the shear stirring paddle 7, the scraping stirring paddle 8 and the toothed baffle 22. After cleaning, the equipment is turned off for subsequent use.

[0024] The above description is only a preferred embodiment of the present utility model. The technical solution of the present utility model is not limited thereto. It should be noted that for those skilled in the art, under the technical teachings provided by the present utility model and as common knowledge in the field, other equivalent modifications and improvements can be made, which should also be considered within the protection scope of the present utility model.

Claims

1. A degradable green plastic package degradation reaction device, comprising a fixed shell frame (1) and a glass kettle (2) placed inside, the lower part of the fixed shell frame (1) is fixedly connected with a supporting plate (3), and the glass kettle (2) is arranged on the upper part of the supporting plate (3), characterized in that: The glass vessel (2) is equipped with a motor (4) at the top, and a stirring rod (5) is fixedly connected to the output end of the motor (4). A push stirring paddle (6), a shearing stirring paddle (7), and a scraping stirring paddle (8) are fixedly connected to the outer wall of the stirring rod (5) from top to bottom. The glass vessel (2) is equipped with a feeding port (9) and an air injection port (10) at the top. The glass vessel (2) is equipped with a discharge port (11) at the bottom, and a discharge valve (12) is fixedly connected to the discharge port (11). The glass vessel (2) is equipped with a liquid injection pipe (13) on the side, and a liquid injection valve (14) is fixedly connected to the liquid injection pipe (13). 4) A heating layer (15) is provided on the outer wall of the glass vessel (2). An electric heating wire (16) is provided in the heating layer (15). A monitoring rod (17) is fixedly connected inside the glass vessel (2). A temperature sensor (18), a humidity sensor (19) and a pH meter (20) are respectively provided at the end of the monitoring rod (17). A control panel (21) is provided on the top of the fixed outer frame (1). The discharge valve (12), the liquid injection valve (14), the electric heating wire (16), the temperature sensor (18), the humidity sensor (19) and the pH meter (20) are all electrically connected to the control panel (21).

2. The degradation reaction device for biodegradable green plastic packaging as described in claim 1, characterized in that: The glass vessel (2) has at least three toothed baffles (22) on its inner wall.

3. The degradation reaction device for biodegradable green plastic packaging as described in claim 2, characterized in that: The angle between the toothed baffle (22) and the inner wall of the glass vessel (2) is 60°.

4. The degradation reaction device for biodegradable green plastic packaging as described in claim 3, characterized in that: A PVC support base (23) is provided between the glass vessel (2) and the support plate (3).

5. The degradation reaction device for biodegradable green plastic packaging as described in claim 4, characterized in that: The glass vessel (2) has an observation window (24) on its outer wall.

6. The degradation reaction device for biodegradable green plastic packaging as described in claim 5, characterized in that: The spacing between the push-pull agitator (6), the shear agitator (7), and the scraper agitator (8) is the same.

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