To promote optimum ...

To promote optimum performance downstream, filtration of boiler feed water streams allows an industrial boiler or power plant to meet the stringent requirements for more efficient boiler performance. Treatment of boiler feed water is required for preventing excessive heat transfer equipment fouling and erosion of turbine blades.

The most common form of corrosion is due to attack of steel by oxygen.   Oxygen attack is accelerated by high temperature and by low pH.  Another form of corrosion is alkali attack which can occur where caustic is concentrated.  Direct attack by steam on the boiler metal can occur at elevated temperatures according to the following reaction:

                                                4H2O + 3 Fe  ->  Fe3O4 + 4 H2

 This type of corrosion can occur in areas of restricted water flow where the entire metal surface is blanketed with steam.  Monitoring the levels of hydrogen in the steam is a simple method of detecting this form of corrosion.

In our experience, some of the operational issues that can severely impact performance include:

• Operation outside rated capacity
• Improper or damaged pressure-reducing valves
• Failure to maintain continuous positive steam pressure
• Infrequent or improper venting
• Leaks in the external vent condenser
• Contaminating deaerated water with oxygenated water

Dosing

For Oxygen removing

Hydrazine  is dosed

N2H4 O2 = N2 + H2O

For High PH

Ammonia dosed or as shown in attached figure

For Cooling water Treatments 

1. To protect the system against damaging corrosion.
2. To control scale formation and fouling which will impair cooling efficiency.
3. To control the growth of harmful microbes like Legionella bacteria.

1. Corrosion inhibitor like zn based

2. Dispersent dosing

3. Chlorine dosing