Steam Boiler Design Superheater Heat exchanger Energy and power
generation
Design Superheater of Steam Boiler
- Superheater is a device for producing superheated steam, typically
a group of tubes exposed to heat through which steam is passed. Its
purpose is to add additional heat to the steam.
- Thus a superheater is employed in the steam boiler to add
additional energy into steam and raise its temperature. The
function of superheater are increase the capacity of the steam
boiler, eliminates erosion of the steam turbine, reduces steam
consumption of the steam turbine.
- Superheater is the tube banks that attain the highest temperatures
in a steam boiler and consequently require the greatest care in the
design, fabrication, and construction to ensure that the
permissible metal temperatures are never exceeded.
- The final sections of superheater must be placed in the highest gas
temperatures, which calls for adopting the most appropriate
high-temperature alloy for the tubing from considerations of metal
temperatures, fouling due to ash compounds and corrosion due to
salts in ash.
Important aspects of superheater
- The most important aspects of the design of superheater are:
uniform distribution of steam and gas across all the sections to
minimize unbalance of flows, optimally high steam velocity in all
the tubes to keep the metal temperatures as low as possible, and
minimum steam pressure losses.
- Superheater pressure drop is normally limited to ∼8% of outlet
pressure to reduce the pumping load.
- The superheater is usually drainable along a single loop of an
inverted U. As the required
- superheat increases or a larger control range is desired, a double
inverted U-type superheater may have to be adopted, making the
heater nondrainable.
- The superheater in a package steam boiler is largely convective.
The degree of control range is also not as large as in
field-erected steam boilers. Occasionally, a loop is pushed into
the furnace space to achieve higher temperature.
Steam Superheater in Boiler Manufacturer in DHB
1. Our boiler superheaters come with adequate safety features to
prolong the life of a superheater as well as your equipment where
the steam is used.
2. The safety valve is installed in a super-heater to prevent
operating pressure to exceed the design pressure of a superheater
in the boiler.
3. We manufacture steam superheaters that suit different type of
fuels such as:
- Solid Fuels (Wood, Rice Husk, Bagasse, Coal)
- Liquid and Gas fuels (Light and Heavy Oils, Natural Gas)
- Electrical operated steam boiler superheaters.
Benefits of Superheaters in Boilers
1 | Increase in efficiency of the steam power plant |
2 | Minimized erosion of turbine blade |
3 | Less steam consumption |
4 | Reduction of condensation loss in the boiler steam pipes |
5 | Increases the temperature of saturated steam by removing entrained
water particles from turbines steam |
Beveling