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
Increase in efficiency of the steam power plant
Minimized erosion of turbine blade
Less steam consumption
Reduction of condensation loss in the boiler steam pipes
Increases the temperature of saturated steam by removing entrained water particles from turbines steam