Plastic Conversion Feed System for Oxygen-Free Reactor Feeding
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Solution Overview
Problem
Existing plastic conversion systems face inefficiencies in transporting and processing shredded and pelletized plastic or hydrocarbonaceous feedstock, particularly in maintaining a controlled environment without air or oxygen, which affects the production of usable compounds.
Innovation Solution
A feedstock conversion system comprising a homogenizer, pelletizer, and extruder, along with a flexible feed conduit, to break up, reduce, and densify the feedstock, ensuring a steady flow into a reactor vessel where controlled chemical and physical reactions occur, minimizing air intrusion and maintaining a controlled environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shredded and pelletized plastic feedstock is transported using conventional systems, then the feedstock can be moved to the reactor, but air or oxygen intrusion occurs affecting the controlled environment
Solution Approach 1:
The patent employs an inert atmosphere system where nitrogen gas is introduced into the feedstock handling and transport system to displace air and maintain an oxygen-free environment. This prevents oxidation and unwanted chemical reactions during feedstock transport to the reactor, ensuring the controlled environment required for pyrolysis processes.
2Productivity
If feedstock is shredded and pelletized, then the feedstock size is reduced and density increased, but consistent and controlled feedstock flow to the reactor is difficult to maintain
Solution Approach 1:
The patent implements a preliminary homogenization step where pelletized feedstock is mixed and conditioned before being fed to the reactor. This preliminary action ensures uniform moisture content, particle size distribution, and flow characteristics, maintaining consistent feedstock flow to the reactor while preserving the size reduction and density benefits of pelletization.
3Productivity
If conventional feed systems are used, then the system complexity is lower, but the yield of gaseous products decreases and unreacted residues increase
Solution Approach 1:
The patent divides the feed system into distinct functional segments: a homogenizer unit for mixing, a pelletizer for size reduction and densification, and a controlled feed conduit system for transport. This segmentation allows each component to be optimized for its specific function, improving overall feedstock quality and reactor performance to increase gaseous product yield, while the modular design keeps system complexity manageable.
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 system achieves a high yield of gaseous products, such as petroleum gases, while minimizing unreacted residues, by ensuring a consistent and controlled feedstock flow and reaction conditions, enhancing the efficiency of the plastic conversion process.
Implementation Method 1
a homogenizer, pelletizer, and extruder, along with a flexible feed conduit, to break up, reduce, and densify the feedstock
Implementation Method 2
a homogenizer, pelletizer, and extruder, along with a flexible feed conduit, to break up, reduce, and densify the feedstock
Implementation Method 3
an extruder capable of forming a continuous mass of feedstock that is fed to said reactor vessel
Data Source
AI summary
A plastic conversion feeding system serves to transport a feedstock through different processing units or stations to a vessel wherein chemical and/or physical reactions occur to produce suitable, useful end products. Various processing units include a homogenizer for breaking up said feedstock, a size reduction device for reducing the feedstock to particles and densifying the same, a heating and/or blending device for heating said feedstock, and a feed conduit connecting said heating and blending device to said vessel. The feedstock conversion unit vessel through various cracking, reforming, condensation, recombination, and recracking operations, produces a mixture of useful gases and condensable gases.