Patent ID: 11883781
Assignee: KOREA INSTITUTE OF MACHINERY & MATERIALS
Field: Chemical engineering (Chemistry)
Classification: CPC B  Y | IPC B

Claim 1:
2. The apparatus of claim 1, wherein
the solution includes the reducing agent that reacts with the NOx of the exhaust gas, and
the apparatus further includes: a water tank having a reducing agent stored therein and supplying the reducing agent to the storage tank;
a pH sensor measuring the pH of the reducing agent stored in the storage tank;
an ORP sensor measuring an ORP of the reducing agent stored in the storage tank; and
a control unit calculating an NOx removal rate based on the measured value of the ORP sensor according to the concentration of NOx of the gas analyzer, outputting the concentration of H2S based on the measured value of the pH sensor, and controlling input timing and an input amount of the reducing agent stored in the water tank according to a set reference value of the NOx removal rate or a set reference value of H2S generation concentration.