Aluminum-plastic solid waste separation and recovery device and method and application thereof

Abstract

The invention discloses an aluminum-plastic solid waste separation and recovery device and method and application thereof, and relates to aluminum-plastic solid waste treatment.The aluminum-plastic solid waste separation and recovery device is characterized in that the aluminum-plastic solid waste separation and recovery device comprises a plurality of immersion cleaning tanks arranged in an array along an annular track; the hanging tool is used for being detachably connected with a placing basket for storing the aluminum plastic solid waste; and the circulating conveying mechanism is connected with the suspension hanging tool and used for driving the suspension hanging tool to move back and forth in the annular track direction of the immersion cleaning tanks, and the suspension hanging tool is hinged to the circulating conveying mechanism and used for sequentially immersing the multiple immersion cleaning tanks back and forth when the suspension hanging tool moves back and forth in the annular track direction. The aluminum-plastic solid waste is sequentially immersed in the pre-washing liquid, the replacement liquid and the cleaning liquid in the immersion washing tank, the copper-containing etching liquid and the aluminum-plastic solid waste material are fully replaced, the plastic sheet with the clean surface can be obtained, the obtained metal copper powder and the aluminum-series purified water are replaced, efficient treatment of liquid waste and solid waste is achieved, the utilization rate is 100%, and the method is suitable for industrial production. And zero discharge of liquid and solid waste is realized.

Description

Technical Field

[0001] This invention relates to aluminum-plastic solid waste treatment technology, and more specifically, to an aluminum-plastic solid waste separation and recycling device, method, and application. Background Technology

[0002] Aluminum-plastic composite packaging is a common packaging material. Its main materials are low molecular weight polyethylene and aluminum foil. The composite packaging made of aluminum-plastic composite packaging is widely used in the packaging of food, pharmaceuticals, chemicals and daily necessities, such as tablet blister packs, food packaging bags, candy wrappers, capsule blister packs and so on. It has good economic value.

[0003] However, if aluminum-plastic composites are not recycled after use, the polyethylene material is difficult to degrade, and aluminum foil metal substances are attached to the surface of the polyethylene. Without treatment, this will cause serious environmental pollution. If aluminum-plastic solid waste can be recycled, it will have great economic value. The recycled plastics can be used as decorative panels in buildings or applied to everyday non-food grade appliances and furniture after cleaning and modification. Moreover, the recycled aluminum component is gradually decreasing in resources and increasing in price. If it can be recycled and reused, it will have important economic value and significance for energy conservation and emission reduction.

[0004] Chinese Patent Publication No. CN115890976A discloses a processing system for aluminum-plastic waste recycling. Its key technical features include: a transmission device for support, a protective device fixedly installed at the center of the upper end face of the transmission device, a material guiding device at the center of the upper end face of the protective device, and a processing device slidably engaged at the lower end face of the material guiding device. By incorporating the material guiding device, this invention allows the geared motor to synchronously provide power to both the processing device and the transmission device through the engaging guide shaft during integrated processing of aluminum-plastic waste. This enables the processing device to crush and guide the aluminum-plastic waste inside the protective device, while the transmission device, through its internal support device and crushing device, simultaneously grinds the falling aluminum-plastic waste. This maximizes the efficiency of aluminum-plastic waste recycling while reducing energy consumption and recycling costs.

[0005] The above-mentioned scheme uses crushing and grinding to recycle aluminum-plastic waste. The crushing device and the support device inside the transmission device grind the aluminum-plastic waste to achieve integrated grinding guidance and recycling. However, the crushing and grinding method of aluminum-plastic waste causes the plastic and aluminum materials in the waste to form a mixture of fine powdered plastic and aluminum powder during the crushing and grinding process. The plastic powder is mixed with metal, resulting in excessive metal content in the plastic, which affects the recycling of plastic. On the other hand, the plastic mixed with metal powder will cause the mixed plastic to be burned during the metal melting and refining process, affecting the purity of the metal. Therefore, it is difficult to effectively separate and recycle the waste.

[0006] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an aluminum-plastic solid waste separation and recycling device, method and its application.

[0008] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an aluminum-plastic solid waste separation and recycling device, comprising...

[0009] A rinsing tank, with several rinsing tanks arranged in an array along a circular trajectory;

[0010] Hanging fixtures are used to detachably connect to storage baskets for aluminum-plastic solid waste.

[0011] A circulating conveying mechanism is connected to a suspension hanger and is used to drive the suspension hanger to move back and forth along the circular trajectory of the immersion tank. The suspension hanger is hinged to the circulating conveying mechanism and is used to immerse the suspension hanger into several immersion tanks in sequence as it moves back and forth along the circular trajectory.

[0012] Pre-washing solution, replacement solution and cleaning solution are sequentially arranged in the array direction of several of the aforementioned immersion tanks.

[0013] The present invention is further configured such that: the circulating conveying mechanism includes a frame, an annular guide rail and a stepper motor group for driving the annular guide rail to move intermittently, a support seat is fixedly connected to the annular guide rail, and the support seat is hinged to one end of the suspension device.

[0014] The invention is further configured such that: the frame is provided with a ring-shaped guide mechanism extending along the direction of the immersion tank array, the guide mechanism abutting against a plurality of suspension hangers, and is used to guide the suspension hangers to move longitudinally and reciprocate up and down along the ring trajectory under the action of gravity.

[0015] The present invention is further configured such that: the guiding mechanism includes a guide rail, the guide rail is provided with a plurality of sunken sections corresponding to the immersion tank along the immersion tank array direction, and when the hanging device is displaced to the sunken section, the placement basket connected to the end of the hanging device is immersed in the immersion tank.

[0016] The invention is further configured such that: the sunken section is V-shaped or slightly curved, and the distance between the guide rail and the support base is less than the distance between the guide rail and the basket.

[0017] The invention is further configured such that: the hanging device includes a rod and hinged portions located at both ends of the rod, and hooks for suspending and placing baskets are rotatably connected to the hinged portions away from the support base.

[0018] The present invention is further configured such that: the replacement solution is selected as etching waste liquid containing copper ions, the pre-washing solution is sodium hydroxide solution with a pH value of 8-9, and the cleaning solution is water.

[0019] The method for separating and recycling aluminum-plastic solid waste employs an aluminum-plastic solid waste separation and recycling device, and its specific steps include:

[0020] Prepare the treatment solution by dissolving sodium hydroxide powder solution in warm water at 30-40℃, adjusting the pH to 8-9 to obtain a pre-wash solution, and use the recovered copper-containing etching waste liquid as a replacement solution after coarse filtration.

[0021] Feeding: The pre-washing liquid and clean water are respectively transported to the adjacent immersion tanks. According to the degree of surface stains of aluminum-plastic solid waste, at least two immersion tanks are set up to fill the pre-washing liquid or clean water. The aluminum-plastic solid waste is placed in the placement basket and then the placement basket is hung on the hook.

[0022] Pre-washing: During the operation of the device, the placement basket suspended on the hanging fixture is first continuously immersed in the immersion tank containing the pre-washing solution for immersion washing. By controlling the operation of the stepper motor, the immersion time of the placement basket in the immersion tank is kept at 30-60 seconds.

[0023] Etching, stepper motor operation, drive the ring guide rail and support to move the hanging fixture from the previous adjacent immersion tank to the next immersion tank, place the basket into the immersion tank of the liquid-filled device, control the operation of the stepper motor to keep the basket in the immersion tank for 30-60 seconds, and the basket is immersed in each immersion tank in sequence.

[0024] The cleaning process involves immersing the placement basket in all the immersion tanks containing the liquid for replacement in sequence. Then, the hanging fixture moves the placement basket to the immersion tank containing clean water. After washing, the placement basket is removed to obtain the plastic substrate, which is then filled with the aluminum-plastic solid waste to be treated.

[0025] The present invention is further configured to include:

[0026] After etching a batch of aluminum-plastic solid waste, the replacement liquid in the first three immersion tanks of the aluminum-plastic solid waste path is recycled to the refining tank, and the replacement liquid in the last three immersion tanks is transported from back to front to the immersion tank, and the replacement liquid is pumped back into the last three immersion tanks.

[0027] The copper-containing replacement solution is used to replace aluminum on aluminum-plastic solid waste to obtain metallic copper powder and aluminum-based water purification agent. After filtration and washing, the metallic copper is centrifuged to obtain copper powder with high copper content.

[0028] An application of aluminum-plastic solid waste separation and recycling: The method of aluminum-plastic solid waste separation and recycling is applied to the separation and recycling of aluminum foil and non-metallic substrate composite materials, including packaging materials for food, pharmaceuticals, chemicals, and daily necessities, as well as building decoration materials.

[0029] It can also be applied to the resource utilization and harmless treatment of copper etching waste liquid generated during the circuit board manufacturing process in the integrated circuit industry.

[0030] In summary, the present invention has the following beneficial effects:

[0031] The aluminum in aluminum-plastic solid waste is dissolved and replaced by etching, thus separating the aluminum from the plastic substrate. This achieves efficient recycling of both the plastic substrate and the aluminum. Several immersion tanks are used in conjunction with a circulating conveyor system, allowing the aluminum-plastic solid waste to be loaded and unloaded at one point. The aluminum-plastic solid waste is sequentially immersed in pre-washing solution, replacement solution, and cleaning solution in the immersion tanks, enabling efficient and continuous etching and cleaning. The plastic substrate can be obtained after one cycle. Furthermore, when the etching waste liquid containing copper ions comes into contact with the aluminum-plastic solid waste, the metallic aluminum in the aluminum-plastic solid waste is replaced by the copper ions in the etching waste liquid. This not only separates and recycles the plastic substrate and metallic aluminum in the aluminum-plastic solid waste, but also recycles the copper component in the etching waste liquid as metallic copper powder. The entire process is clean, environmentally friendly, and low-pollution. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention.

[0033] In the diagram: 1. Immersion tank; 2. Hanging fixture; 3. Circulating conveyor mechanism; 31. Frame; 32. Support base; 33. Guide rail. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Example 1: An aluminum-plastic solid waste separation and recycling device is used for the separation and recycling of aluminum foil and non-metallic substrate composite materials, including packaging materials for food, pharmaceuticals, chemicals, daily necessities, and building decoration materials, specifically such as aluminum-plastic packaging products like tablet boards, food packaging bags, candy wrappers, and capsule boards. The device includes:

[0036] Immersion tank 1, and several immersion tanks 1 are arranged in an array along a circular trajectory;

[0037] Hanging fixture 2 is used for detachably connecting to the storage basket for aluminum-plastic solid waste;

[0038] The circulating conveying mechanism 3 is connected to the hanging fixture 2 and is used to drive the hanging fixture 2 to move back and forth along the circular trajectory direction of the immersion tank 1. The hanging fixture 2 is hinged to the circulating conveying mechanism 3 and is used to immerse the hanging fixture 2 into several immersion tanks 1 in a back-and-forth manner when it moves back and forth along the circular trajectory direction.

[0039] Several immersion tanks 1 are arranged in sequence according to their array direction, containing pre-washing liquid, replacement liquid and cleaning liquid.

[0040] In this embodiment, the immersion tank 1 can be divided into a pre-washing tank, an etching tank, and a cleaning tank according to the type of solution it contains. The number of pre-washing tanks, etching tanks, and cleaning tanks depends on the number of immersion tanks 1 containing the corresponding solutions. Specifically, there are at least two pre-washing tanks, and the number depends on the degree of surface stains on the aluminum-plastic solid waste being treated. If there are large areas of solidified oil stains or other dirt on the surface of the aluminum-plastic solid waste, the number of immersion tanks 1 containing pre-washing solution can be increased. The number of etching tanks and cleaning tanks increases according to the amount of aluminum-plastic solid waste stored in the basket at one time and the size of the surface area of ​​the aluminum-plastic solid waste. This achieves high processing efficiency when continuously separating and recycling aluminum-plastic solid waste and ensures efficient separation of plastic substrate and aluminum material in aluminum-plastic solid waste, reducing the mutual influence between plastic substrate and aluminum material, and maximizing resource utilization.

[0041] Specifically, the replacement solution is an etching waste liquid containing copper ions obtained after processing copper-clad laminates to prepare circuit boards; the pre-wash solution is a sodium hydroxide solution with a pH of 8-9; and the cleaning solution is water. Specifically, the etching waste liquid containing copper ions contains hydrochloric acid as the main component of the etching solution, mixed with copper chloride. Multiple immersion tanks 1 containing the etching waste liquid are set up. During repeated immersion between the aluminum-plastic solid waste tanks 1, the hydrochloric acid and copper chloride in the etching waste liquid replace the aluminum material, thereby obtaining aluminum chloride and polyaluminum chloride solutions. After the copper ions are replaced, solid metallic copper powder is obtained. After filtration and cleaning, pure metallic copper material is obtained, exhibiting high separation and recovery capacity and efficiency. In this embodiment, sodium hydroxide solution is selected as the pre-washing solution, which can effectively remove oil and impurities from the surface of aluminum-plastic solid waste through alkaline washing. The at least two pre-washing tanks ensure that the aluminum-plastic solid waste moves in the pre-washing tank at least once, thus ensuring the removal of grease and impurities. Adding clean water to the cleaning tank as the washing solution can give the washed plastic substrate good cleanliness. Alternatively, an appropriate amount of sodium hydroxide powder can be added to a cleaning tank near the etching tank to dissolve it and adjust the pH value of the clean water in a single cleaning tank to the range of 8-9. This is to neutralize the small amount of replacement solution carried by the plastic substrate when it moves from the last etching tank to the cleaning tank and is immersed, thereby reducing the total number of cleaning tanks and improving cleaning efficiency.

[0042] The circulating conveying mechanism 3 includes a frame 31, an annular guide rail, and a stepper motor group that drives the annular guide rail to move intermittently. A support base 32 is fixedly connected to the annular guide rail, and the support base 32 is hinged to one end of the suspension hanger 2.

[0043] The frame 31 is provided with a ring-shaped guide mechanism extending along the array direction of the immersion tank 1. The guide mechanism abuts against several hanging fixtures 2 and is used to guide the hanging fixtures 2 to move longitudinally and reciprocate up and down along the ring trajectory under the action of gravity. Specifically, the guide mechanism includes a guide rail 33. The guide rail 33 is provided with several sinking sections corresponding to the immersion tank 1 along the array direction of the immersion tank 1. The sinking sections are V-shaped or slightly curved. The distance between the guide rail 33 and the support base 32 is less than the distance between the guide rail 33 and the placement basket. In this embodiment, the sinking section adopts a V-shaped structure so that when the hanging fixture 2 moves to the sinking section, the hanging fixture 2 moves to the lowest point along the guide direction of the sinking section under its own weight and the downward gravity provided by the placement basket and the aluminum-plastic solid waste. At this time, the placement basket connected to the end of the hanging fixture 2 is immersed in the immersion tank 1.

[0044] The hanging device 2 includes a rod and hinged parts located at both ends of the rod. Hooks for hanging baskets are rotatably connected to the hinged parts away from the support base 32.

[0045] Example 2: A method for separating and recycling aluminum-plastic solid waste, using an aluminum-plastic solid waste separation and recycling device, the specific steps of which include:

[0046] Sodium hydroxide powder solution was dissolved in warm water at 30-40℃, and the pH was adjusted to 8-9 to obtain a pre-washing solution. The recovered etching waste liquid containing copper ions was coarsely filtered and used as a replacement solution.

[0047] Feeding: The pre-washing liquid and clean water are respectively transported to the adjacent immersion tank 1. According to the degree of surface stains of aluminum-plastic solid waste, at least two immersion tanks 1 are set up to fill the pre-washing liquid or clean water. The aluminum-plastic solid waste is placed in the placement basket and then the placement basket is hung on the hook.

[0048] Pre-washing: During the operation of the device, the placement basket suspended on the hanging fixture 2 is first continuously immersed in the immersion tank 1 containing the pre-washing liquid for immersion washing. By controlling the operation of the stepper motor, the immersion time of the placement basket in the immersion tank 1 is kept at 30-60 seconds.

[0049] Etching, stepper motor operation, drive the ring guide rail and support 32 to move the hanging fixture 2 from the previous adjacent immersion tank 1 to the next immersion tank 1, place the basket into the immersion tank 1 containing the liquid for changing the device, control the operation of the stepper motor to keep the basket in the immersion tank 1 for 30-60 seconds, and the basket is immersed through each immersion tank 1 in sequence.

[0050] The cleaning process involves immersing the placement basket in all the immersion tanks 1 containing the liquid for changing the container. Then, the hanging device 2 moves the placement basket towards the immersion tank 1 containing clean water. After washing, the placement basket is removed to obtain the plastic substrate, which is then loaded with the aluminum-plastic solid waste to be treated.

[0051] After etching a batch of aluminum-plastic solid waste, the replacement liquid in the first three immersion tanks 1 of the aluminum-plastic solid waste path is recycled to the refining tank, and the replacement liquid in the last three immersion tanks 1 is transported from back to front to the immersion tank 1, and the replacement liquid is pumped back into the last three immersion tanks 1.

[0052] The copper-containing replacement solution is used to replace aluminum on aluminum-plastic solid waste to obtain metallic copper powder and aluminum-based water purification agent. After filtration and washing, the metallic copper is centrifuged to obtain copper powder with high copper content.

[0053] Working principle: The circular production line formed by the aluminum-plastic solid waste separation device continuously replaces copper-containing etching solution with aluminum-plastic solid waste materials to recover metals and plastics. Specifically, the copper-containing etching solution is pumped into the immersion tank 1 of the circular production line as the replacement solution. Then, aluminum-plastic solid waste materials are placed in baskets and sequentially immersed by the circulating conveying mechanism 3. When the aluminum-plastic solid waste materials are immersed in the copper-containing etching solution, the aluminum on the surface of the aluminum-plastic solid waste materials is replaced by copper. After the aluminum on the surface of the aluminum-plastic solid waste materials is completely replaced, they are rinsed with clean water to obtain clean plastic sheets. Then, the replaced metallic copper in the immersion tank 1 of the circular production line is centrifuged and filtered to obtain copper powder with a high content and aluminum-based water purification agent. The aluminum-based water purification agent contains aluminum salts, such as aluminum sulfate, polyaluminum chloride, and polyaluminum sulfate.

[0054] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An aluminum-plastic solid waste separation and recycling device, characterized in that: include Immersion tank (1), several immersion tanks (1) are arranged in an array along a circular trajectory; Hanging fixture (2) is used to detachably connect to the storage basket for storing aluminum-plastic solid waste; The circulating conveying mechanism (3) is connected to the hanging fixture (2) and is used to drive the hanging fixture (2) to move back and forth along the circular trajectory direction of the immersion tank (1). The hanging fixture (2) is hinged to the circulating conveying mechanism (3) and is used to immerse the hanging fixture (2) in several immersion tanks (1) in turn when it moves back and forth along the circular trajectory direction. Pre-washing liquid, replacement liquid and cleaning liquid are arranged sequentially in the array direction of several of the immersion tanks (1).

2. The aluminum-plastic solid waste separation and recycling device according to claim 1, characterized in that: The circulating conveying mechanism (3) includes a frame (31), an annular guide rail, and a stepper motor group that drives the annular guide rail to move intermittently. A support seat (32) is fixedly connected to the annular guide rail, and the support seat (32) is hinged to one end of the suspension hanger (2).

3. The aluminum-plastic solid waste separation and recycling device according to claim 2, characterized in that: The frame (31) is provided with a ring-shaped guide mechanism extending along the array direction of the immersion tank (1). The guide mechanism abuts against several suspension hangers (2) and is used to guide the suspension hangers (2) to move longitudinally and reciprocate as they move along the ring track under the action of gravity.

4. The aluminum-plastic solid waste separation and recycling device according to claim 3, characterized in that: The guiding mechanism includes a guide rail (33), which has several sunken sections corresponding to the immersion tank (1) along the array direction of the immersion tank (1). When the hanging device (2) moves to the sunken section, the placement basket connected to the end of the hanging device (2) is immersed in the immersion tank (1).

5. The aluminum-plastic solid waste separation and recycling device according to claim 4, characterized in that: The sunken section is V-shaped or slightly curved, and the distance between the guide rail (33) and the support base (32) is less than the distance between the guide rail (33) and the basket.

6. The aluminum-plastic solid waste separation and recycling device according to claim 1, characterized in that: The hanging fixture (2) includes a rod and hinges at both ends of the rod, with hooks for hanging baskets rotatably connected to the hinges away from the support base (32).

7. The aluminum-plastic solid waste separation and recycling device according to claim 1, characterized in that: The replacement solution is an etching waste liquid containing copper ions, the pre-wash solution is a sodium hydroxide solution with a pH value of 8-9, and the cleaning solution is water.

8. A method for separating and recycling aluminum-plastic solid waste, using the aluminum-plastic solid waste separation and recycling device as described in any one of claims 1-7, characterized in that: The specific steps include: Prepare the treatment solution by dissolving sodium hydroxide powder solution in warm water at 30-40℃, adjusting the pH to 8-9 to obtain a pre-wash solution, and use the recovered copper-containing etching waste liquid as a replacement solution after coarse filtration. Feeding: The etching waste liquid containing copper ions is put into the immersion tank (1) located in the middle section, and the pre-washing liquid and clean water are respectively transported to the adjacent immersion tank (1). According to the degree of surface stains of aluminum-plastic solid waste, at least two immersion tanks (1) are set to be filled with pre-washing liquid or clean water. The aluminum-plastic solid waste is placed in the placement basket and then the placement basket is hung on the hook. Pre-washing: During the operation of the device, the placement basket suspended on the hanging fixture (2) is first continuously immersed in the immersion tank (1) containing the pre-washing liquid for immersion washing. By controlling the operation of the stepper motor, the immersion time of the placement basket in the immersion tank (1) is kept for 30-60 seconds. Etching, stepper motor operation, drive the ring guide rail and support base (32) to move the hanging fixture (2) from the previous adjacent immersion tank (1) to the next immersion tank (1), place the basket into the immersion tank (1) containing the liquid for changing the device, control the operation of the stepper motor, keep the basket in the immersion tank (1) for 30-60s, and the basket is immersed through each immersion tank (1) in sequence. After the placement basket is immersed in all the immersion tanks (1) that hold the liquid for changing, the hanging fixture (2) moves the placement basket to the immersion tank (1) that holds clean water. After washing, the placement basket is removed to obtain the plastic substrate, and the aluminum-plastic solid waste to be treated is loaded onto it.

9. The method for separating and recycling aluminum-plastic solid waste according to claim 8, characterized in that: Also includes: After etching a batch of aluminum-plastic solid waste, the replacement liquid in the first three immersion tanks (1) of the aluminum-plastic solid waste path is recycled into the refining tank, and the replacement liquid in the last three immersion tanks (1) is transported from back to front to the immersion tank (1), and the replacement liquid is pumped back into the last three immersion tanks (1). The copper-containing replacement solution is used to replace aluminum on aluminum-plastic solid waste to obtain metallic copper powder and aluminum-based water purification agent. After filtration and washing, the metallic copper is centrifuged to obtain copper powder with high copper content.

10. An application of aluminum-plastic solid waste separation and recycling, characterized in that: The aluminum-plastic solid waste separation and recycling method as described in claim 8 or 9 is applied to the separation and recycling of aluminum foil and non-metallic substrate composite materials, including packaging materials for food, pharmaceuticals, chemicals, and daily necessities, as well as building decoration materials. It can also be applied to the resource utilization and harmless treatment of copper etching waste liquid generated during the circuit board manufacturing process in the integrated circuit industry.

Images