Stationary boiler drum

The drum of a stationary boiler (Eng. Drum ) is an element of a stationary boiler designed to collect and distribute a working fluid , to separate steam from water, purify steam , and provide a supply of water in the boiler.

Boiler and lowering pipes, feed pipes, safety devices and instrumentation are connected to the boiler drum. Separation devices are placed inside the boiler drum.

Boiler drums are made of sheet boiler steel with a thickness of 13 to 40 mm (depending on steam pressure) with a diameter of up to 1000 mm with stamped bottoms and a manhole. The inner part of the volume of the boiler drum, always filled with water to a certain level, is called the water volume, and the steam filled during operation of the boiler is called the steam volume. Steam volume is needed to collect the steam generated in the boilers. The surface of boiling water in the drum of the boiler, separating the water volume from the steam, is called the evaporation mirror, which should be between the marks of the lowest and highest water levels in the boiler. The water level enclosed in this volume during the process of vaporization continuously changes both upward and downward, but within the limits established by the water level marks, which allows the operator to regulate the operation of the boiler. The surface of the boiler walls, washed on the inside by water or steam, and on the outside by gases, is called the heating surface, measured in square meters and indicated. The heating surface is usually determined from the side heated by gases.