degasifiers

A degasifier is a device or system used to remove dissolved gases from liquids. Dissolved gases such as oxygen, carbon dioxide, nitrogen, or noble gases can be undesirable in many processes because they promote corrosion, gas release, or treatment inefficiencies. Degasification works by reducing the gas’s partial pressure in contact with the liquid, by enhancing gas transfer to a sweep gas, by heating to lower gas solubility, or by using membranes that selectively transmit gases.

Common methods include vacuum degassing, steam or gas stripping (deaeration), membrane-based degassing, and mechanical or chemical approaches. In vacuum degassing, the liquid flows through a chamber at reduced pressure so dissolved gases exsolve and vent to the atmosphere. In steam stripping or deaeration, the liquid is heated and exposed to steam or hot gas, releasing dissolved gases that are removed by venting. Membrane degassers use gas-permeable membranes and a sweep gas to carry away the liberated gases. Dynamic or mechanical methods may use agitation and reduced pressure to enhance gas release.

Typical components of a degasifier include an inlet for the liquid, a degassing chamber or contact area, a means to provide the low-pressure or high-temperature environment, a vent or exhaust for the removed gas, and an outlet for the degassed liquid. Some systems incorporate membranes, agitators, or additional heating stages to improve efficiency.

Applications span water treatment, power generation, chemical processing, oil and gas, and food, beverage, and pharmaceutical industries. In power plants and boilers, deaerators remove oxygen and carbon dioxide from feedwater to reduce corrosion. In industry, degasifiers improve product stability, prevent gas-related reactions, and protect equipment from gas-related damage. Maintenance focuses on vent integrity, membrane fouling, and proper control of pressure and temperature.