This technology is a series of unique technological processes gradually formed by the company from technology introduction and digestion to technology optimization and innovation, covering technologies such as medium-pressure iron removal filtration, cation bed mixed bed, powder resin covering filtration, in vitro regeneration, resin powder coating, and resin iron powder removal, as well as low-pressure oil and iron removal and in-body regeneration desalination processes. Closed condensate water systems for the power, metallurgy and chemical industries.

Condensate water fine treatment technology is a dedicated purification technology for condensate water in industrial steam systems. By precisely removing pollutants such as salts, metal corrosion products, and suspended particles from the water, it makes the condensate water meet the reuse standards. It is mainly applied in industries that rely on steam circulation, such as thermal power, nuclear power, and chemical engineering, and is a key technical support for improving water resource utilization and ensuring the safety of thermal equipment.

I. Technical Core: Why Fine Processing Is Needed?

Condensate water is the product of heat release and condensation of steam. It should have high purity, but in actual circulation, the water quality will decline due to three major pollution sources: the first is the iron and copper oxide particles produced by the corrosion of thermal equipment (such as boilers and steam turbines); The second is the trace salts and dissolved gases carried by the steam; The third reason is the introduction of external impurities due to poor system sealing. If these pollutants are directly reused, they will aggravate the scaling of boilers and the accumulation of salt in steam turbines, causing the heat exchange efficiency to drop by more than 30%, and even leading to equipment pipe burst accidents. Therefore, they must be purified through fine treatment technology.

Ii. Core Process System: Three-stage purification closed loop

The fine treatment of condensate water usually adopts a three-stage process of "pre-filtration + deep desalination + post-protection". The pre-filtration takes the covered filter or magnetic filter as the core, and uses porous filter materials or magnetic adsorption to remove corrosion products with a particle size of ≥5μm (such as iron oxide, copper oxide), with a filtration accuracy of up to 1μm, reducing the load on subsequent equipment. Deep desalination is the core link. The mainstream method adopted is ion exchange (such as mixed beds and powder resin filters), which adsorbs salt ions in water through anion and cation exchange resins, reducing the conductivity from tens of μS/cm to below 0.1μS/cm. The post-treatment protection system retains resin particles through a precision filter to ensure the stability of the treated water quality. Some systems are also equipped with iron removal filters to further reduce the content of metal ions.

Iii. Key Technology Types: Adapted to scenarios as needed

According to the industry characteristics and water quality requirements, the technical types are divided into two mainstream ones. The first is the fixed-bed ion exchange technology, which adopts a series mode of "cation bed + anion bed + mixed bed". After the resin fails, it needs to be regenerated. It is suitable for conventional thermal power plants with small water quality fluctuations, and the water treatment capacity can reach several thousand cubic meters per hour. The second is powder resin filtration technology, which involves mixing and reacting powder ion exchange resin with condensate water. The resin and contaminants are retained through a filter without the need for resin regeneration. It has a fast response speed and is suitable for scenarios with extremely high water quality requirements such as nuclear power plants and ultra-supercritical units. It can control the sodium content of condensate water below 1μg/L. In addition, membrane separation technologies (such as reverse osmosis and nanofiltration) are gradually being applied to the treatment of high-salt condensate water, achieving efficient separation of salts from water.