What is the positioning requirement for super heaters in relation to steam drums?

The correct answer emphasizes that superheaters should be placed as close as possible to the steam drum in an upright position for several important reasons.

Firstly, situating the superheaters near the steam drum helps ensure that the steam entering the superheater is in a dry, superheated state. This is critical for maintaining efficiency and protecting the superheater tubes from damage due to water carryover, which can lead to thermal shock. By positioning them close to the drum, any moisture content in the steam can be minimized before it enters the superheaters.

Secondly, the upright positioning of superheaters facilitates the natural circulation of steam, ensuring effective heat transfer and reducing the risk of uneven heating. This arrangement allows steam to flow through the superheaters smoothly, thereby improving the overall thermal efficiency of the boiler.

Additionally, placing superheaters in this manner supports proper drainage of condensate, which is essential for preventing water from accumulating within the superheater. Proper drainage prevents overheating and potential failure of the superheater components.

Overall, proximity to the steam drum and an upright orientation are critical requirements that enhance the performance and longevity of the superheating system in a boiler setup.