Continuous Plastic Pyrolysis With Oxygen and Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Continuous pyrolysis processes are hindered by the introduction of oxygen from ambient air, which disrupts the pyrolytic process.
Innovation Solution
A system and method for continuous pyrolysis that includes a pyrolysis chamber, heating chamber, and feeding chamber, with a flame injector and pumping device to control oxygen concentration and pressure to maintain a controlled environment, and a controller to manage oxygen levels and pressure to prevent ambient air entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous pyrolysis is implemented with feeding chamber opened to ambient atmosphere, then productivity is improved, but oxygen enters the pyrolysis chamber and disrupts the pyrolytic process
Solution Approach 1:
A heating chamber is introduced as an intermediary between the feeding chamber (opened to ambient atmosphere) and the pyrolysis chamber. This heating chamber acts as a buffer zone where air is heated and oxygen levels are controlled before material enters the pyrolysis chamber, preventing direct oxygen contamination while maintaining continuous operation.
Solution Approach 2:
The system changes the temperature parameter of the air in the heating chamber to create a thermal barrier. By heating the air to high temperatures before it reaches the pyrolysis chamber, the system alters the physical state and chemical reactivity of the air, preventing oxygen from interfering with the pyrolytic decomposition process.
2Stability of the object's composition
If oxygen concentration is controlled in the heating chamber, then pyrolytic process stability is improved, but device complexity increases due to sensors and controllers
Solution Approach 1:
An oxygen sensor is installed in the heating chamber to continuously monitor oxygen concentration levels. The controller receives real-time feedback from the sensor and automatically adjusts the flame injector operation to maintain oxygen concentration between 8-10%, creating a closed-loop control system that stabilizes the pyrolytic process.
Solution Approach 2:
The system replaces manual or mechanical control methods with electronic sensing and automated control. The oxygen sensor and controller substitute for complex mechanical regulation mechanisms, providing precise and responsive control of oxygen levels through electronic feedback rather than mechanical adjustment.
3Object-affected harmful factors
If pressure is maintained above ambient in the feeding chamber, then prevention of ambient air entry is improved, but energy consumption increases
Solution Approach 1:
The pumping device creates positive pressure in the feeding chamber before ambient air can enter through the opening. By establishing the pressure differential in advance, the system prevents oxygen contamination proactively rather than reacting to contamination after it occurs, reducing the need for continuous high-energy operation.
Solution Approach 2:
The system uses pneumatic pressure control through the pumping device to manage air flow. By maintaining positive pressure in the feeding chamber, the system creates a pneumatic barrier that prevents ambient air infiltration without requiring complete sealing or excessive pressure differentials, optimizing energy consumption.
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 ensures a controlled pyrolytic environment by maintaining oxygen concentration between 8% and 10% and pressure above ambient, preventing disruption and enabling efficient continuous pyrolysis of plastic materials.
Implementation Method 1
a flame injector device coupled to the second input opening of the heating chamber and injecting ambient air and fuel into the heating chamber
Implementation Method 2
the pump to maintain pressure in the feeding chamber above ambient pressure to prevent ambient air from entering the feeding chamber via the third opening
Implementation Method 3
an Oxygen (O2) sensor, or, alternatively a CO2 sensor, installed within the heating chamber
Data Source
AI summary
A continuous pyrolysis system including a pyrolysis chamber, a heating chamber, a feeding chamber having a pressure input, an output coupled to the pyrolysis chamber, and a feeding opening opened to ambient atmosphere, a flame injector injecting ambient air and combustible material into the heating chamber, a pumping device with an input coupled to the heating chamber, and an output coupled to the pressure input of the feeding chamber, a O2 sensor within the heating chamber, and/or a pressure transducer within the feeding chamber, and a controller coupled to the O2 sensor, the pressure transducer, the flame injector, and the pumping device, for controlling the flame injector to inject ambient air and/or combustible material to maintain within the heating chamber O2 concentration between 8% and 10%, and/or for controlling the pumping device to maintain pressure in the feeding chamber above ambient pressure.