Where are convection superheaters located in a boiler system?

In a boiler system, convection superheaters are positioned away from the fire. Their primary function is to enhance the temperature of the steam as it moves through the superheater tubes, making use of the hot gases that flow through the boiler. This location benefits the superheating process because it allows for effective heat exchange without being directly exposed to the flames.

Convection superheaters are typically located in areas where they can receive the maximum amount of heat from the flue gas while avoiding direct radiant heat from the furnace flames, which could cause overheating or damage to the superheater tubes. By circulating steam through these tubes, which are exposed to hot gases, the moisture in the steam is removed, thus increasing its temperature and quality before it enters the steam system.

The other potential locations like near the fire or in the water chamber do not facilitate the desired heating process as effectively as positioning them away from the fire, where the flow of gases can be optimized for heat transfer. Placing them above the steam drum would not be ideal either, as that could complicate the flow dynamics and heat absorption needed for effective superheating.