Steam

Desuperheaters are a critical component used in the management of steam from power generation sources to industrial uses of steam. Kiekens delivers Desuperheaters for all kind of steam applications that experience wide variations in load.

Desuperheaters as solution for Steam applications

Desuperheaters are used to control and condition the temperature of superheated steam, which is crucial for many industrial processes. Superheated steam in itself is however a complex phenomenon that can use some further explanation.

“Ordinary” steam is water in the gas phase, which is formed when water boils. Steam is invisible; however, the term “steam” is often used to refer to wet steam, the visible mist or aerosol of water droplets formed as this water vapor condenses. At lower pressures, such as in the upper atmosphere or at the top of high mountains, water boils at a lower temperature than the nominal 100 °C (212 °F) at atmospheric pressure.

What is steam?

Steam is water in the gas phase, which is formed when water boils. Steam is invisible; however, “steam” often refers to wet steam, the visible mist or aerosol of water droplets formed as this water vapour condenses. At lower pressures, such as in the upper atmosphere or at the top of high mountains, water boils at a lower temperature than the nominal 100 °C (212 °F) at atmospheric  pressure. If heated further it becomes superheated steam.

What is superheated steam?

Superheated steam is steam that is heated above the previously mentioned boiling temperature of 100 °C (212 °F) at atmospheric pressure. This process involves a few different steps. When additional heat content is added to boiling water in liquid condition, the heat content (enthalpy) of the water further increases. The temperature of the water, however, maintains a constant value until all liquid has been evaporated to a gaseous state. At this point, a condition of so-called saturated steam is reached. When additional heat content is added to saturated steam, a condition of superheated steam is obtained. Superheated steam is also known as “dry” steam, as it contains no droplets.

Diagram for steam

What is desuperheated steam?

Desuperheated steam is steam that is cooled or attemperated by a Desuperheater. If the temperature of superheated steam is not constant, processes are difficult to control, particularly when there are wide variations in load and pressure. A Desuperheater lowers or controls the temperature of superheated steam by injecting a calculated amount of water droplets into the flow stream. As a result, the saturated steam can be used more effectively for heating and the transfer of heat in all kinds of industrial processes. Desuperheated steam improves the quality of industrial products or processes and can reduce unscheduled downtime of the production line.

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