The bunker for temporary storage of coal


The ever growing demand for energy, and investments in new power plants which have been postponed over many years, have recently led to a remarkable boom in the construction of power plants. This requires the use of enormous amounts of steel and a considerable amount of rolled sections. In the area of coal power plants, the proportion of rolled sections accounts for approx. 60% of the total steel volume. The need for short construction times and rising labor costs make the use of rolled sections attractive. 

Most notable in power plants are the large cooling towers and the boiler frame structures, which, however, are later enclosed by the boiler house. But not only these large structures make up a power plant. A number of dependent buildings are necessary to accommodate all the necessary units, such as the power house, in which the generators are located, and the bunker for temporary storage of coal.


power plants


How does a boiler frame structure of a modern coal power plant like?The staircases have been designed as solid constructions and will later provide access to all areas. In the upper part of the boiler frame structure the pre-installed boiler frame trusses can be seen that will later reinforce the boiler when in operation. In the bottom section in front of the boiler frame structure, the upper structure of the boiler house can be seen which, together with the bottom part of the boiler house, will fully surround the boiler frame structure once lifted in its final position. For this, a large number of rolled sections are used.

For the storage of the coal, a bunker is required. While the bunker structure normally consists of heavy I-sections or box sections, the house structure and working platforms are normally made of rolled sections. In the air heater house, which is attached to the boiler house, fresh air is pre-heated by the flue gas stream. Again, rolled sections are used for the house structure and working platforms. Then there is also the power house and dependent buildings that are constructed mainly with rolled sections.

In addition to using rolled I-sections as bending beams and supports in platforms, facades and steel structures, they are also often used in bracings and trusses.

In these kinds of power plants, rolled sections are not only profitably used for the surrounding structures, but also for internal structures (platforms and supporting framework).