Four Reasons to Deaerate Your Feedwater
By installing a deaerator in your boiler feedwater system, you can improve the life of your equipment and reduce costs associate with repairs or replacements. There are four reasons why you should contact a deaerator supplier and make changes to your boiler-plant operations. These reasons include: oxygen removal, carbon-dioxide removal, improved operations, and significant energy savings.
1. Oxygen Removal
Oxygen corrosion is a serious problem for metal structures. In other words, without preventative measures, rust can form on the inside of feedwater tanks. This jeopardizes the structural integrity of the tank itself, but it can also alter the purity of the feedwater. When oxygen corrosion occurs, it usually results in pitting and despite the small amounts, failure can occur. A deaerator works to remove the oxygen out of the feedwater.
2. Carbon-dioxide Removal
When carbon-dioxide works with oxygen in the system, the effect is 40% more corrosion that either of the two elements acting alone. The alkalinity of the boiler water influences the amount of carbon-dioxide present, and it is released through the steam. In order to avoid corrosion in the return-lines, the feedwater should be deaerated immediately to keep the carbon-dioxide from getting recycled through the system.
3. Improved Operations
A deaerator also improves the functionality of a boiler, as it uses steam to heat the boiler feedwater. Hot feedwater helps reduce the impact of continual expansion and contraction on the surfaces. When pumps don’t have consistency with temperature, there could be increased risk for damage and that increases costs associated with maintenance and repairs. Deaerators help stabilize the overall temperature of the feedwater and boiler.
4. Energy Savings
By trapping the exhaust steam and flash steam that is normally released into the atmosphere, a deaerator is able to put the pressure back into boiler system process and regulate the temperature without energy output. It saves on fuel costs required to heat the system. Blowdown heat recovery can also bring another additional 3% of fuel savings.
Rather than spending funds on repairs and replacements, a better investment is a deaerator system. The initial cost can be recovered quickly given the benefits of an improved feedwater boiler system.