Recycling PP Medical Drip Bags via Kneading and Screening
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Solution Overview
Problem
Used PP composite medical drip soft bags cannot be completely recycled and are typically incinerated, resulting in the production of harmful gases and environmental pollution.
Innovation Solution
A method and device for recycling and granulating PP composite medical drip soft bags, involving crushing, cleaning, dehydration, mixing with a co-solvent, heating, kneading, filtering, extruding, cooling, shaping, and vibration screening to produce granulated particle materials, which are then stored by size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If incineration is used to dispose of used PP composite medical drip soft bags, then waste disposal is achieved, but harmful gases and environmental pollution are produced
Solution Approach 1:
The patent converts the harmful waste material (used medical drip soft bags) into useful recycled granules through a multi-step process including crushing, cleaning, dehydration, heating, kneading, filtering, extruding, cooling, shaping, and granulating. This transforms the harmful incineration approach into a beneficial recycling process that produces reusable materials while eliminating harmful gas emission.
Solution Approach 2:
The patent employs parameter changes throughout the recycling process, including temperature control during heating (150-300°C), moisture content adjustment during dehydration, and size separation through vibration screening. These parameter changes enable the transformation of waste plastic into standardized recycled granules suitable for new product manufacturing.
2Object-generated harmful factors
If complete recycling process is implemented, then environmental pollution is reduced, but processing complexity increases
Solution Approach 1:
The recycling process is divided into distinct operational segments: crushing unit, cleaning unit, dehydration unit, heating and kneading unit, filtering unit, extruding unit, cooling unit, shaping and granulating unit, and vibration screening unit. Each segment performs a specific function, making the complex recycling process manageable and systematic.
Solution Approach 2:
The patent introduces intermediary substances and processes, including the use of a co-solvent during mixing and a vibration screening mechanism for size separation. These intermediaries facilitate the transformation and classification of recycled materials, enabling efficient processing while maintaining product quality.
3Productivity
If recycling process is implemented, then reusable materials are produced, but processing time and energy consumption increase
Solution Approach 1:
The patent implements continuous processing through the multi-unit system where materials flow sequentially through crushing, cleaning, dehydration, heating, kneading, filtering, extruding, cooling, shaping, and granulating stages. This continuous operation maximizes productivity while managing energy consumption through optimized process parameters at each stage.
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
Enables the efficient recycling of PP composite medical drip soft bags, improving processing efficiency and reducing environmental pollution by converting waste into reusable materials.
Implementation Method 1
heating the fragment mixture to a predetermined temperature for kneading
Implementation Method 2
cooling the fragment mixture
Data Source
AI summary
Provided are a method and a device for recycling and granulating PP composite medical drip soft bags. The method includes: putting a fragment mixture of a recycled PP composite medical drip soft bag into a hopper; heating the fragment mixture to a predetermined temperature for kneading, filtering the heated fragment mixture, and then extruding the heated fragment mixture after filtering; cooling the fragment mixture; shaping and granulating the fragment mixture to form a plurality of particle materials; cleaning the particle materials; dehydrating the particle materials; vibration screening the particle materials according to different sizes; and outputting the particle materials with respective sizes to different storage barrels. This is used to recycle PP composite medical drip soft bags to achieve the effects of recycling, improving processing efficiency and creating friendly environment.