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STEAM GENERATORS (BOILERS)
Brief Introduction
The steam generators heaters are made
with coils made of seamless tubes, where the feed water is preheated
and evaporated during the flow through these. The heat is
transferred to the water/steam mixture as radiant heat in the
combustion chamber, where the inner cylindrical tube coil and a flat
tube coil forms the chamber wall and the bottom respectively.
Consequently refractory concrete is avoided. The combustion gasses
are hereafter cooled in the outer convection part, as the gasses
pass the space between the two tube coils. The thermal design
ensures a modest volume of steam relative to the size of the heater,
and allows unlimited thermal expansion due to the high temperatures.
The pressure part are designed as standard up to 40 bar pressure
although operation pressure might between 3 - 10 barg.
This industrial type steam generator is a forced circulation water
tube boilers. Unlike the conventional
3-pass steam boilers (fire/smoke
tube boiler),
the water in the steam generators contains a very small water and
steam volume (content of the pressure vessel inside
the tube).
This gives a lot of advantages:
The steam generators are delivered in the range 100 - 1,000 kg/h
steam at 3 bar and all the way up to 10 bars (for special
applications). These complete units are easy to install and does not
require any special foundation, but can be place directly on a
concrete floor. Rapid start-up time down to 2-3 minutes on the
smaller sizes. |
