Part-1 of this article discussed the Turbo-Generator & the Power House structures of a thermal power plant. Some other important components of such a plant are:
The Boiler Structure: As the name suggests, this very important structure hosts the boiler drum at a certain height. It is usually a quite tall structural steel framework consisting of a good number of columns & beams thus requiring careful inspection of structural steel-work during construction phase.
The Electro-Static Precipitator unit: This unit is meant for environmental purposes. Without it, such a plant could be an environmental hazard and thus a very useful structure from environmental or ecological point of view. This is another structure involving plenty of structural steel & reinforced cement concrete work besides piping work etc.
The Chimney structure: Another major structure & an integral component of a thermal power plant. Depending on requirements, a chimney could be a couple of hundreds of meters or even more in height. It is usually shell-shaped reinforced cement concrete structure with a wide base which keeps tappering as the height increases. All the waste hot gases get exhausted through the top outlet at a safe elevation in order to avoid air pollution. The inside surfaces of the chimney is usually fire-protected by using special heat refractory linings or other similar materials thus rendering the structure heat resistant. Slip-form technique is an effective method for casting a chimney or similar other structures.
Over and above these major units there are many smaller yet important structures in a thermal plant. Some of these may vary a bit from plant to plant. Near the Boiler drum unit, usually placed are the Forced Draft (FD) fan & PA fan structures. Somewhere at a suitable location lies the Bunker Mills unit meant for grinding the coals used as fuel for coal based thermal plants. There are also Induced Draft (ID) fan unit whose deck slabs host the ID fans. There are plenty of auxiliary footings/supports etc. to facilitate substantial piping involved in any such plant There are also various utilities besides the roads buildings electricity etc which are very much necessary to run any plant