Device and system for decomposing and oxidizing gaseous pollutant

A thermal reactor for removing a pollutant from waste gas, comprising:

• a thermal reaction unit, comprising a chamber and at least one waste gas inlet, the waste gas inlet communicating with the chamber to introduce a waste gas into the chamber;
• an ignition unit, arranged below the thermal reaction unit and connected to the thermal reaction unit, the ignition unit comprising an outer wall, an inner wall, a premixing chamber defined between the outer wall and the inner wall, and a flame chamber defined by the inner wall;
• and
• a chilling unit, arranged below the ignition unit, connected to the ignition unit and configured to receive a gas stream from the thermal reaction unit, wherein the chilling unit comprises a water curtain flowing through an inner wall of the chilling unit;
• wherein the premixing chamber contains a fuel and a gas mixed with the fuel, the flame chamber communicating with the premixing chamber through at least one through hole in the inner wall, and the fuel enters the flame chamber via the through hole and is ignited by a pilot flame after being mixed with the gas in the premixing chamber.