Blade System for Mixed Plastic Waste Recycling
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Solution Overview
Problem
Current recycling technologies are inefficient and costly for processing unsorted, unidentified, and unclean mixed plastic waste due to the need for sorting, high energy consumption, environmental pollution, and inability to operate in low temperatures, limiting the recycling of plastics with different molecular weights.
Innovation Solution
A device and method for recycling mixed plastic waste using a robust blade system with a double-walled agglomeration chamber, capable of operating at high temperatures and low temperatures, which processes mixed plastic waste without preliminary washing, achieving efficient mixing, melting, and crushing of plastics with different types and densities, producing a stable raw material suitable for new products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sorting plastic waste by type is performed, then recycling quality is improved, but processing cost and time increase significantly
Solution Approach 1:
The invention extracts the sorting step from the recycling process entirely. Instead of sorting plastic waste by type before recycling, the system directly processes mixed plastic waste through mechanical crushing and thermal treatment, eliminating the time-consuming sorting operation while maintaining recycling effectiveness.
Solution Approach 2:
The recycling system is designed to handle multiple types of plastic waste simultaneously through a universal processing approach. The mechanical crushing and thermal treatment methods work on various plastic types (PET, HDPE, LDPE, PP, PS) without requiring separate processing lines or pre-sorting, making the system multi-functional and adaptable to mixed waste streams.
2Manufacturing precision
If sorting plastic waste by type is performed, then recycling quality is improved, but processing cost increases
Solution Approach 1:
The invention removes the expensive sorting infrastructure from the recycling system. By eliminating the need for sorting equipment, facilities, and operational costs associated with type-based separation, the system achieves cost-effective processing of mixed plastic waste through direct mechanical and thermal treatment.
Solution Approach 2:
The system changes the processing parameters to accommodate mixed plastic types. Instead of maintaining separate processing conditions for different plastic types, the mechanical crushing and thermal treatment parameters are optimized to effectively process a mixture of plastics, reducing the need for complex, type-specific equipment and operations.
3Use of energy by moving object
If mechanical processing is applied to mixed plastic waste, then energy consumption decreases, but processing effectiveness worsens due to different molecular weights
Solution Approach 1:
The invention optimizes processing parameters including temperature, pressure, and residence time to ensure effective processing of mixed plastics with different molecular weights. The thermal treatment parameters are specifically adjusted to accommodate the range of plastic types, maintaining processing reliability while energy efficiency.
Solution Approach 2:
The system processes mixed plastic waste as a composite material mixture rather than attempting to process each plastic type separately. The mechanical and thermal processing methods are designed to handle the composite nature of mixed plastics, where different polymer types are processed together through unified treatment parameters that account for their diverse properties.
4Device complexity
If standard recycling equipment is used, then device complexity is reduced, but operational capability in low temperatures deteriorates
Solution Approach 1:
The heating system is designed with dynamic temperature control capabilities, allowing the equipment to adapt to different ambient temperature conditions. The system can maintain optimal processing temperatures regardless of outdoor environmental conditions, enabling operational versatility across different climates without increasing overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the recycling of unsorted, unclean mixed plastic waste into a reusable mixture with reduced energy consumption, increased productivity, and the ability to operate outdoors in various temperatures, producing a stable raw material with low moisture content and suitable fragment size for subsequent production processes.
Implementation Method 1
The biggest problem is that polymers of different types do not mix because their molecular weight differs and they have long polymer chains. Heating polymers is not enough to break down their molecules.
Implementation Method 2
a blade system attached to the shaft... the blades crush the material of the mixed plastic waste being recycled
Implementation Method 3
the equipment is provided with a cooling system equipped with a cooling inlet and a cooling outlet, a transmission and lubricating chamber, and a lubricating pump, equipped with an additional preheater
Implementation Method 4
the plastic waste compacting equipment... where plastic waste is crushed, heated, melted, and rapidly cooled with cold water, and the cooled-down plastic mixture is crushed
Implementation Method 5
Adding cold water and using thermal shock achieves rapid aggregation, which is broken up by the blades at the same time
Implementation Method 6
the agglomeration chamber comprises a double wall
Data Source
AI summary
A blade system for device for recycling mixed plastic is disclosed. Furthermore, a device and a method for recycling unidentified, unclean, and unsorted mixed plastic into reusable plastic mixture is disclose. The present solution allows the recycling of mixed plastic waste outdoors, both in warm and cold climate conditions. In the course recycling mixed plastic waste the mixed plastic waste is taken to a melting temperature, at which the mixed plastic waste is mixed in a molten state, and the organic and bacterial material is destroyed during the thermal processing. After the melting, mixing and thermal processing of the mixed plastic waste, the compaction process of the molten mixed plastic waste is performed. Volume compacting is performed, and the mass of mixed plastic waste in a molten state is rapidly cooled down, crushed, after-cooled and homogenized.