What is Diaerator?

Deaerator is a mechanical device that eliminates melted gases, such as carbon dioxide and oxygen, from feed before it gets to the boiler and its pipes. Deaeration is carried out to prevent corrosion, to reduce the maintenance of plants and operating costs. This can also reduce plant downtime. Generally, two basic types of deaerators are used: the type of tray and the type of spray. Water cascade down by layers of perforated trays. At the bottom of the deaerator of the tray type, low -pressure steam is produced, which moves up through perforated trays. The steam comes into contact with the supply water and heats it to a saturated temperature, causing oxygen and other corrosive gases to separate. The melted gases leave by ventilation at the top of the Diarator, while the deaered supply water falls to the bottom and the storage tank. In many cases, the spray is introduced first into a preheated section that raises the temperature to help release oxygen and other gasy. The steam is produced at the bottom of the Jerator and rises to meet the heated power water and scrubs the gases. These gases are released at the top. The storage tank is located under the Deaerator for accepting the processed power water.

Oxygen and other corrosive gases may not be completely removed by deaeration in steam systems operated under high pressure. In such cases, it may be necessary to use a chemical that is an oxygen gadget. Sulfizite sodium is the most popular oxygen; However, it can be divided into acid gases at a high temperature that increases corrosion and beats the purpose of deaeration. The steam systems using high pressure should use the gadgets of organic oxygen.

Deaerator, as well as other equipment in the plant, will experience wear and should therefore be regularly checked and maintained. It is good to perform regular off-line checks of Deaerator to keep it in goodm condition. The checklist will help in performing routine checks to avoid missing steps in the maintenance procedure.