Classification of Superheater in Steam Boiler

Superheater is a device consists of tubes which get the heat from the product of combustion to add additional heat into steam, so the temperature of the steam passing through the tubes raise higher than its saturation temperature. The superheater can help steam boiler increase its capacity because help turbine generator get its required steam both in terms pressure and temperature.

Classification of superheater can be classified based on design of flow:
1.      Parallel Flow  Superheater
A superheater which has direction of steam flow in superheater same with the direction of flue gas flow
2.      Counter Flow Superheater
A superheater which direction of steam flow in superheater opposite with the direction of flue gas flow
3.      Mix Flow Superheater
A superheater which direction of steam flow in superheater same and opposite with the direction of flue gas flow

Classification of superheater can be classified based on heat transfer:
1.      Convection Superheater
The convection superheater is located somewhere in the flue gas flow, where it absorbs heat transfer by convection.
2.      Radiant Superheater
Radiant superheater is located in or near furnace of steam boiler and receives heat transfer from combustion process by radiation.
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Classification of superheater can be classified based on arrangement:
1.      Vertical Superheater
The superheatar are arranged vertically. This type has is easy to suspend and has free moving to expand. But the disadvantage, it is not drainable.
2.      Horizontal Superheater
The superheatar are arranged horizontally. This type has is more difficult to suspend and should give special support to give moving for expand. But the advantage, it is drainable.

2 comments:

Ankit said...

What about platen & pendant superheater??
what are they?

steam boiler said...

The superheater could be set up as pendant surface area (very clear backspace among tubes) or maybe platen surface area (close to-tangent backspace among tubes). Various heat transfer approaches are applied if determining platen and pendant placements. The pendant design provides better efficient area caused by a higher number of the tube circumference obtainable to take in heat out of the flue gases. This particular brings about lesser number of superheater rows within depth pertaining to the similar steam temperature increase.