Water deaeration for power plants V2WD-I

Tor the deaeration of boiler feed water and for the backfeed of district heating pipelines, corosys offers an interesting alternative to the usual deaeration processes in industry with the V2WD high-vacuum deaeration system. Known processes in the power plant industry, such as chemical deaeration of water or introduction of superheated steam, can be replaced directly.

Our new development deaerates water under vacuum to residual oxygen levels below 10 ppb without the additional use of a stripping gas, which is not directly available in industry, even at temperatures below 30°C. High-precision oxygen measurement in the outlet of the water deaeration system allows the function to be monitored and the residual oxygen content to be documented.

The process is used in power plants wherever lowest oxygen levels are required to minimize the introduction of non-condensable gases into a steam network or line corrosion. Water deaeration is characterized by its high operational reliability and low energy consumption.

Advantages and functions

Water deaeration with a two-step vacuum process without stripping gas, CO2 or N2
Zero Emission of greenhouse gases
No subsequent use of chemical degassing agents or superheated steam
Lowest residual oxygen values < 10 ppb
Water degassing with low energy consumption
Optional in-line oxygen measurement
Easy operation, low maintenance effort, long service life
Fully automatic operation with standard PLC and touch panel / Possibility for Open Black-Box design
Optional integration in process control system and remote maintenance
Individually dimensioned and designed for each specific application
Use of components and makes specified by the customer
Compact tubular-frame system (skid mounted)

Technical Description

The water is evenly distributed at the head of the column to the structural packings of the water deaeration. It trickles down slowly through the packings. The high performance structured packing of the water deaeration allows the water to be well distributed in the column, creating a large surface area and optimally removing oxygen from the water. By combining 2 degassing stages at different pressures, lowest oxygen levels are achieved.

The use of stripping gas, as in previous conventional applications, is not necessary! The degassed water is pumped out of the column sump and optionally cooled by a plate apparatus.

Sensors for oxygen, level, flow and temperature monitor the water degassing for proper operation. The water deaeration can be controlled by a PLC control system with touch panel or by a higher-level process control system. Our deaeration systems are pre-assembled on a frame, tested and prepared for integration into existing process technology.