Ultrapure water system and condensate treatment system

Client: SIEMENS & Entrade GmbH (ENKA) partnership

Project: PJSC Kazanorgsintez combined cycle power plant demineralization and condensate polishing plant

Scope

Design, manufacture, and delivery of: Demineralization plant Condensate polishing plant Capacity

• Demineralization plant: 2 x 14 m³/h
• Condensate polishing plant: 2 x 15 m³/h

Delivery

2021

 

The provision of clean and sufficient water resources is crucial for the operation and performance of power plants. Whether thermal, hydroelectric, nuclear, or renewable energy production—clean water is essential. Sustainable water management and the protection of water resources are important for meeting water requirements in energy production and ensuring the long-term sustainability of power plants.

Power plants are known to consume the most water among energy facilities. In these plants, water is used as process and cooling water. Process water is pure water that is passed through the pipes in the boiler. Pure water prevents substances such as magnesium and calcium from damaging the equipment. The heat energy released during combustion converts the water into steam. However, it is not enough for the water to enter the steam phase; heat energy continues to be supplied.

With the further development of boiler and steam turbine designs to improve efficiency and reduce emissions, the demands on pure water systems are increasing. The most important of these systems are reverse osmosis and EDI systems. The water to be purified is first physically filtered. After the dissolved substances have been removed by the reverse osmosis membrane, the water is converted into ultrapure water by the advanced purification system.

ARTAS UMWELT has developed a demineralization water treatment system for the PJSC Kazanorgsintez combined cycle power plant (CCGT-TPP). Suspended solids, color, and taste are removed using a pretreatment unit. Ultrafiltration (UF) is a pressure-driven barrier against suspended solids, bacteria, viruses, endotoxins, and other pathogens to produce water with very high purity and low sludge density. The product water from ultrafiltration enters the product water tank of the ultrafiltration unit. Filtered water passes through the first and second pass reverse osmosis units to remove dissolved or suspended chemical species and biological substances (mainly bacteria) and is used in industrial processes and for the production of drinking water.

Advanced electro-deionization (EDI) technology is typically used after reverse osmosis (RO) to produce high-purity and ultra-pure water. EDI systems consume only electricity and can be operated continuously, producing pure product water of consistent quality without chemical waste. The systems have a very small footprint and do not require frequent maintenance.