Water treatment adds to output

A waste-to-energy plant in Baden-Württemberg, Germany has improved its production of district heating and electricity through the replacement of an outdated plant used to treat boiler feed water with a more efficient system employing state-of-the-art technology.

For the project, Sera supplied an automatic dosing system for the monitoring and optimal conditioning of the boiler feed water, which is important for the trouble-free operation of steam generators and avoiding downtime. The dosing pumps were also designed to meet the required plant parameters with a flow rate of up to 40l/h at a boiler pressure of more than 100 bar.

The system included an “inner feed water treatment” which takes place inside the boiler. In contrast to “outer feed water treatment” all of the used water ends up in the boiler.

The pH value of the water is then neutralised by adding (injecting) potassium hydrogen phosphate and caustic potash to the feed water so that it does not corrode and damage the boiler walls.