Why are HRT boilers set inclining from front to rear?

HRT boilers, or Horizontal Return Tubular boilers, are designed with an incline from front to rear primarily to facilitate drainage and the removal of impurities. When water and steam circulate within the boiler, any sediments or impurities that settle at the bottom need to be effectively drained to maintain operational efficiency and boiler longevity. The incline helps ensure that any sludge or buildup can flow toward the rear of the boiler where drainage outlets are typically located. By aiding in this drainage process, the boiler operates more efficiently and reduces the risk of corrosion or damage that could be caused by trapped impurities.

While heat distribution is also important for overall efficiency, the specific design of the incline primarily addresses the need to manage water quality within the system effectively. The other choices, such as aesthetics or increasing steam pressure, do not accurately reflect the functional design considerations of HRT boilers.