Atmospheric Plasma Generator NOx Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Atmospheric-pressure plasma devices generate NOx when producing high-temperature plasma in environments with oxygen and nitrogen, which is harmful and regulated, necessitating a solution to suppress NOx generation.
Innovation Solution
An atmospheric pressure plasma generator is designed with a control system that monitors NOx concentration using sensors and adjusts the plasma gas temperature to maintain it below a threshold, utilizing a heating gas supply device to control the plasma gas temperature and limit NOx generation, while ensuring the plasma gas is heated to an effective temperature for processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-temperature plasma gas is generated in atmospheric pressure plasma device, then plasma processing effectiveness is improved, but NOx generation increases
Solution Approach 1:
The invention changes the temperature parameter of the plasma gas by introducing a temperature control mechanism. A temperature sensor detects the plasma gas temperature, and a control unit adjusts the plasma generation conditions (such as gas flow rate, power input) to maintain the temperature below a threshold that prevents NOx formation, while still achieving effective plasma processing through optimized parameter combinations
Solution Approach 2:
The invention implements a feedback control system where a temperature sensor continuously monitors the plasma gas temperature and feeds this information to a control unit. The control unit adjusts plasma generation parameters in real-time based on the temperature feedback, creating a closed-loop control that maintains temperature within the range that achieves processing effectiveness without generating NOx
2Object-generated harmful factors
If temperature control mechanism is added to suppress NOx, then NOx generation is reduced, but device complexity increases
Solution Approach 1:
The invention enables the plasma device to self-regulate its temperature and prevent NOx formation through an automated control system. The temperature sensor and control unit work together to automatically adjust plasma generation parameters without requiring manual intervention, making the system self-correcting and reducing the need for additional complex external control mechanisms
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 effectively suppresses NOx generation to below regulatory thresholds, allowing for safe operation while maintaining the plasma gas temperature for efficient processing, such as imparting hydrophilicity to objects.
Implementation Method 1
a heating gas supply device that supplies heated gas to the plasma gas in order to control a temperature of the plasma gas
Implementation Method 2
a sensor that detects at least one of a temperature of the plasma gas, a concentration of NOx, and a concentration of ozone
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An object of the present invention is to provide an atmospheric pressure plasma gas generator capable of suppressing a generation of NOx. The atmospheric pressure plasma generator includes a heater for heating a plasma gas ejected from a reaction chamber for generating plasma. A control device controls the heater based on a signal output by a NOx sensor so that a concentration of NOx becomes a threshold or smaller. As a result, the amount of generation of NOx can be limited to the threshold or smaller.