Condensate

The primary purpose of condensate treatment is to protect the boiler system from corrosion and scale formation. Corrosion can occur when dissolved oxygen and carbon dioxide in the condensate react with metal surfaces, leading to the degradation of boiler components. Scale formation, on the other hand, is the accumulation of mineral deposits from the condensate, which can impede heat transfer and reduce the overall efficiency of the boiler.

Condensate treatment involves various steps to ensure the purity and quality of the water. These steps typically include filtration to remove suspended solids, ion exchange to remove dissolved ions, and chemical dosing to control pH levels and prevent corrosion. Some common chemicals used in condensate treatment include alkalizing agents like ammonia or amines to neutralize acidity, oxygen scavengers to remove dissolved oxygen, and filming amines to create a protective layer on metal surfaces.

1. Neutralizing Amines: Neutralizing amines are primarily used in condensate treatment to raise the pH and neutralize acidic conditions in the condensate water before it is returned to the boiler. The acidic components, such as carbon dioxide, can cause corrosion in the boiler and associated equipment. By adding neutralizing amines, the pH of the condensate is increased, creating an alkaline environment that helps protect the boiler system from corrosion. These amines are dosed in the condensate lines or in the feedwater to maintain the desired pH level.

2. Filming Amines: Filming amines, on the other hand, are used as corrosion inhibitors in the boiler water itself. They form a thin, protective layer on the metal surfaces of the boiler and prevent corrosive substances from coming into contact with the metal. Filming amines can provide long-term protection against corrosion, even during periods of low or no operation. They are typically added directly to the boiler water, either continuously or intermittently, to maintain the protective film.