1. Power Plant Construction and QA/QC Section 2.6– Water Treatment
Engineering Technology Division
Power Plant Construction and QA/QC
Section 2.6– Water Treatment

2. Overview Introduction Chemistry Basics Pretreatment Demineralization
Section 2.6– Water Treatment
Overview
Introduction
Chemistry Basics
Pretreatment
Demineralization
Condensate Polishing
Boiler Protection

3. Chemicals and compounds in water create corrosive environments.
Section 2.6– Water Treatment
Introduction
Water Treatment is the attempt to remove anything that is not water molecules.
Chemicals and compounds in water create corrosive environments.
pH is a measure of acidity or alkalinity.
Failure to maintain chemistry control can lead to reduced efficiency and/or premature failure.
Understanding the source water chemistry is the key to determining Water Treatment requirements.

4. Chemistry Basics – Water Source
Section 2.6– Water Treatment
Chemistry Basics – Water Source

5. Chemistry Basics – Water Source
Section 2.6– Water Treatment
Chemistry Basics – Water Source

6. Chemistry Basics – River Water
Section 2.6– Water Treatment
Chemistry Basics – River Water

7. Chemistry Basics – Tap Water
Section 2.6– Water Treatment
Chemistry Basics – Tap Water

8. Chemistry Basics – Industrial Contaminants
Section 2.6– Water Treatment
Chemistry Basics – Industrial Contaminants

9. Chemistry Basics – Other Contaminants
Section 2.6– Water Treatment
Chemistry Basics – Other Contaminants

10. Chemistry Basics – Other Contaminants
Section 2.6– Water Treatment
Chemistry Basics – Other Contaminants

11. Section 2.6– Water Treatment
Pretreatment

12. Pretreatment – Waste Water Varies by use
Section 2.6– Water Treatment
Pretreatment – Waste Water
Varies by use

13. Demineralization – Resin Type
Section 2.6– Water Treatment
Demineralization – Resin Type
Negative Valance
Positive Valance

14. Demineralization – Reverse Osmosis Process
Section 2.6– Water Treatment
Demineralization – Reverse Osmosis Process

15. Demineralization – Reverse Osmosis
Section 2.6– Water Treatment
Demineralization – Reverse Osmosis

16. Demineralization – Evaporation
Section 2.6– Water Treatment
Demineralization – Evaporation
Typically operates in a vacuum to reduce source heat.

17. Demineralization –Distillation
Section 2.6– Water Treatment
Demineralization –Distillation

18. Section 2.6– Water Treatment
Condensate Polishing

19. Section 2.6– Water Treatment
Condensate Polishing

20. Section 2.6– Water Treatment
Boiler Protection
When source water is properly analyzed and water treatment address the impurities, then Boiler Protection is provided.
To Improve protection, additional chemicals can be added (Oxalates, pH controls, H2, etc)
Oxygen and Carbon Dioxide reduction in the De-aeration process reduces corrosive environments.

21. Section 2.6– Water Treatment
Questions?