the consequence of high superheat temperture in steam boiler

When heat energy is added, the steam temperature is increased above the saturation temperature. Superheated steam is referred to as ‘dry’ steam meaning it contains no water droplets. This effect can also occur when the pressure of saturated steam is reduced through a pressure control valve.

For example with a boiler one needs a high 10 Bar and even then the saturation temperature is only 180°C – even at 100 Bars the saturation temperature is only 311°C. Steam generators do not have to operate at high pressure for the high temperature- typically thus offer high-temperature dry-steam.

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An increase in the boiler pressure is in the result limited by material of the reactor pressure vessel. The case of the increase in the average temperature at which energy is added by heat transfer, requires either a superheating of steam produced or an increase in the pressure in the boiler (steam generator).

Mar 04, 2020· Negative Effects of Increasing the Steam Temperature Increasing the steam temperature results in small increase in heat input. There is a limit to which the …

Thank you very much for your answer.Subject is written ‘ Causes of high temperature corrosion in boiler ’. High temperature corrosion occur in boilers occurs mainly in two areas- waterwalls and superheaters. The inorganic impurities in fuel like vanadium, sodium, sulphur, etc., are responsible. Read on to learn more about how this happens.

If the saturated steam produced in a boiler is exposed to a surface with a higher temperature, its temperature will increase above the evaporating temperature. The steam is then described as superheated by the number of temperature degrees through which it …

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These conditions disrupt the temperature/pressure balance, causing the fluid (steam) system to seek out a new equilibrium. When this occurs in a closed vessel, as the liquid accidentally heats above its boiling point, the frantic and almost instantaneous physics of the system trying to re-establish equilibrium can result in explosion.

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.

When the steam temperature is high, the injection of water reduces the temperature and produces an increased volume of steam available to turn the turbine and produce electricity. If the steam passes through the turbine at the high temperature, no additional electricity is produced and the excess energy that was contained in the superheated steam is lost to the condenser circuit.