Purging is an essential part of which boiler operational cycle?

Purging is a crucial step in the firing cycle of a boiler's operation. This process involves removing any combustible gases that may be present in the combustion chamber before introducing fuel and igniting the burners. The primary purpose of purging is to prevent the risk of explosion or flashback by ensuring that the area is clear of unburned gases. During the firing cycle, proper purging allows for safe ignition and stable combustion, ensuring that the boiler operates efficiently and safely.

In contrast, the cooling cycle, condensing cycle, and heating cycle each involve different processes and sets of operational priorities that do not primarily focus on the removal of combustible gases prior to ignition. These cycles have distinct requirements and functions that do not necessitate purging in the same critical manner as the firing cycle. Thus, understanding the role of purging and the importance of safety during the firing cycle is essential for boiler operation and risk mitigation.