Plasma Control via Magnetic Field in Exhaust Gas Treating
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Solution Overview
Problem
Conventional exhaust gas treating apparatuses using plasma face challenges in enhancing treating efficiency without increasing energy consumption or reducing treatment capacity, and often suffer from structural complexity and durability issues.
Innovation Solution
A control method for plasma using a magnetic field generated by coils or magnets on the outer circumference of the plasma discharge space, which controls the plasma state by applying a current or magnetic field, preventing electron and particle scattering and optimizing plasma utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the plasma length (discharge distance) is extended to raise treating capacity, then the treating efficiency is improved, but the energy consumption is increased
Solution Approach 1:
The invention changes the magnetic field parameters (strength, distribution, orientation) to optimize plasma characteristics. By adjusting magnetic field parameters, the plasma density and electron temperature are controlled, enhancing treating efficiency without requiring extended plasma length, thus avoiding increased energy consumption.
Solution Approach 2:
The invention introduces dynamic control of plasma state through time-varying magnetic fields. The magnetic field can be adjusted during operation to maintain optimal plasma conditions, allowing efficient treatment without fixed long discharge paths that would increase energy consumption.
2Productivity
If the diameter of the reaction tube is reduced to increase contact efficiency between plasma and exhaust gas, then the treating efficiency is improved, but the absolute amount of treating is decreased and the reaction tube durability is reduced
Solution Approach 1:
The invention uses magnetic field parameter adjustments to enhance plasma density and reactivity, allowing effective treatment in standard-sized reaction tubes. This maintains both high treating efficiency and large absolute treatment capacity without reducing tube diameter.
Solution Approach 2:
The magnetic field acts as an intermediary that enhances the interaction between plasma and exhaust gas. By introducing the magnetic field as a mediating factor, the reaction efficiency is improved without requiring reduced tube dimensions, thus preserving both efficiency and treatment capacity.
3Productivity
If the diameter of the reaction tube is reduced to increase contact efficiency, then the treating efficiency is improved, but the reaction tube is likely to be damaged due to proximity between tube wall and plasma
Solution Approach 1:
The invention adjusts magnetic field parameters to control plasma confinement and temperature distribution. This allows maintaining high treating efficiency while preventing excessive plasma-wall interaction that would damage the reaction tube, thus preserving apparatus durability.
4Productivity
If exhaust gas is fed into the reaction tube from the tangential direction to induce vortex flow and increase contact efficiency, then the treating efficiency is improved, but the structure of the feeding unit becomes complicated
Solution Approach 1:
The magnetic field serves as an intermediary that induces rotational motion and enhances plasma-exhaust gas interaction without requiring complex tangential feeding structures. The magnetic field naturally guides plasma movement, achieving vortex-like effects with simple axial feeding geometry.
Solution Approach 2:
The invention replaces the mechanical complexity of tangential feeding systems with a magnetic field-based approach. Instead of using complex mechanical structures to create vortex flow, the magnetic field induces the desired flow patterns, simplifying the overall system structure.
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
This method enhances exhaust gas treating efficiency by minimizing plasma loss and maintaining high treatment capacity without excessive energy consumption, using a simple and structurally robust approach.
Implementation Method 1
controlling the state of the plasma generated in the plasma discharge space by generating a magnetic field in the plasma discharge space
Implementation Method 2
a Lorenz force acts on electrons and discharge particles forming the plasma by the action of the magnetic field
Data Source
AI summary
A plasma control method for an exhaust gas treating apparatus includes providing an exhaust gas treating apparatus having a plasma discharge space, a coil disposed on an outer circumference of the plasma discharge space, an upper electrode, and a lower electrode; generating plasma in the plasma discharge space; controlling the state of the plasma generated in the plasma discharge space by generating a magnetic field in the plasma discharge space between the upper electrode and the lower electrode; and cooling the reaction tube using a water cooled jacket disposed around the reaction tube. The magnetic field is generated by applying a current to the coil.