How many drums does an "A" type boiler typically have?

An "A" type boiler typically has three drums, which is a characteristic feature of this design. The configuration includes a top drum, which serves as a steam separator, and two lower drums that are utilized for water circulation and steam generation. This design allows for efficient heat transfer and the management of water and steam flow within the boiler, contributing to its operational efficiency.

The three-drum setup ensures that water can circulate effectively, enhancing the overall thermal performance and allowing for a higher steam production rate. Additionally, having multiple drums helps in achieving a better separation of steam from water, further optimizing the boiler's performance under varying load conditions. This configuration is particularly advantageous in large industrial applications where high steam output is required.