What is required for proper operation of the furnace pressure in a boiler?

For the proper operation of the furnace pressure in a boiler, it is important that the pressure is maintained below atmospheric pressure. This is primarily to ensure that any potential flue gas leaks do not escape into the surrounding area, which can be harmful and pose safety risks. By maintaining a slightly negative pressure, the furnace effectively prevents external air from infiltrating, which can disrupt the combustion process and lead to inefficiencies or unsafe conditions.

Negative pressure assists in enhancing the flow of combustion gases out of the furnace and supports optimal draft conditions. It is essential for ensuring that the hot gases generated during combustion are effectively removed from the boiler system. This configuration also helps to maintain safety, as any leaks or breaches in containment would draw in air rather than allowing potentially hazardous gases to escape.

Overall, operating the furnace at a pressure below atmospheric levels is crucial for efficient operation, safety, and maintaining the integrity of the boiler system.