Placement of Oxygen analyzer Probe in Blast Furnace Fuel-Fired Boiler for Effective Combustion

Abstract

- Effective combustion is crucial in the boiler section of any type of power plant. This can be achieved through accurate measurement and prediction of oxygen, NOx, and CO. A review of numerous studies has revealed that placing probes in power plants is a difficult task; at the maximum, we found that O₂ Analyzers are placed between the preheater and economizer sections. Once the oxygen level is controlled, it takes some time to read the updated values of oxygen; during this time, losses occur from the distance of the probe placement and the high temperature that makes direct placement of probes in boilers impossible. In order to discover an alternative choice, we are employing two ways in this study. In method 1, we introduce a circular pipe for flue gases directly into a sensor panel that is located close to the boiler section fuel quantity measurement. We do this by taking a tapping point through a boiler knob. This method allows for the possibility of rebuilding the boiler by replacing the well of the oxygen analyzer near the economizer and preheater section by directly taking a tapping point in the boiler for flue gas fed back to an externally installed oxygen analysis panel. High fuel pressure is reached through this tapping point to an oxygen sensor panel placed outside near the boiler. The installed system was used for the commissioning work. The ideal boiler operating conditions were established (with the amount of CO formation in the flue gases at a minimum) and relative outputs get more accurate and quick response against previous process efficient for further process. In method 2, indirect oxygen measurement using a charge-coupled device was carried out by directly installing a camera in the furnace section to obtain high-definition images and facilitate additional variable prediction.