Treatment of Steam Boiler and Heating Water
Whenever water is raised to higher levels of temperature, problems may arise, caused by its ingredients:
- Hardness components thereby lead to scale deposits in the boiler and within the entire heating system – these not only cause a loss of power and hence higher energy costs, but lead to thermal strains too, which may cause expensive material damage (e.g. so called pipe bursts in steam boiler facilities).
- On the other hand dissolved gases in water (carbon dioxide, oxygen) are released when water is heated, and lead to corrosion, especially within the vapour zone and the condensate sector of a steam boiler, but in closed heating systems too.
The Optimum of Steam Boiler and Heating Water Treatment
An ideal water treatment extends life-time of your boiler installation considerably and saves energy costs – and such an optimal water treatment comprises basically a feed-water softening or demineralising system and a subsequent corrosion inhibitor addition.
Function of the water softening (by means of an appropriate softening system) is to dispose hardness components in raw water; a demineralization of water by means of specialised ion exchange resins or RO devices removes the salt ions in question thoroughly.
Corrosion Prevention for Steam Boilers and Heating Systems
Softening or (part) demineralization transforms feed-water to a more corrosive substance, hence a subsequent loading of an anti-corrosion agent is essential for a trouble-free operation of the boiler.
In fighting this several basic modes of function of an anti-corrosive additive are possible:
- Film former create an adipoid (greasy) protective film on the boiler surface which prohibits or delays the corrosion process.
- On the other hand aggressive components of the feed-water, as for example oxygen, are bound and disposed by certain ingredients of our corrosion protection agents; additionally this agents increase alkalinity of the boiler water, which means to create an ideal pH environment for corrosion prevention, neutralizing coincidentally existing carbonic acid.
- Phosphates establish a protective layer on the boiler surface and remove possibly still existing residual hardness.
In steam boiler installations dissolved oxygen in feed-water, which may lead to heavy oxygen corrosion, is removed by thermal degassing and subsequent chemical absorption of residual oxygen – this is done by oxygen scavengers like sulfite, DEHA or hydrazine.
For the different requirements and applications you can come back to two of our product lines: