What phenomenon can be caused by an accumulation of vapors in the boiler?

The accumulation of vapors in the boiler can lead to a furnace explosion. This occurs when flammable vapors are present and become concentrated in a confined space, such as within the boiler furnace. If these vapors find a source of ignition — such as a spark or flame — an explosive reaction can occur, leading to a release of energy that causes a significant explosion within the furnace area. This is particularly relevant in scenarios involving improper venting, inadequate combustion air supply, or malfunctioning safety devices, which can allow an unsafe build-up of flammable materials.

Understanding this phenomenon is essential for boiler operators since it highlights the importance of proper maintenance, regular inspections, and adherence to safety protocols to prevent dangerous accumulations of vapors that could lead to catastrophic events. Additionally, familiarity with these risks aids in developing effective safety measures and emergency response plans.