Dearator Tank / تنك الدياريتور |
A DE-aerator is mechanical device that remove dissolved gases from boiler Feed water. DE aeration protects the steam system from the effects of corrosive gases. It accomplishes this by reducing the concentration of dissolved oxygen and carbon dioxide to a level where corrosion is minimized. A dissolved oxygen level of 5 parts per billion (ppb) or lower is needed to prevent corrosion in most high pressure boilers. While oxygen concentrations of up to 43 ppb may be tolerated in low-pressure boilers, equipment life is extended at little or no cost by limiting the oxygen concentration to 5 ppb. Dissolved carbon dioxide is essentially completely removed by the DE-aerator during the DE aerator high feed water boiler temperature (102º ~ 105º).
Why the DE aerator important for the boiler?
Oxygen is the main cause of corrosion in hot well tanks, feed lines, feed pumps and boilers. In particular, dissolved oxygen in boiler feed waters will cause serious corrosion damage in steam systems by attaching to the walls of metal piping and other metallic equipment and forming oxides. If carbon dioxide is also present then the pH will be low, the water will tend to be acidic, and the rate of corrosion will be increased. Typically the corrosion is of the pitting type where, although the metal loss may not be great, deep penetration and perforation can occur in a short period , and boiler will produce the steam faster if the boiler feed water 105º, and with DE aerator we have` not choke between high temperature water, then we have not foaming and Waving