Difference between desalinated water and boiler water
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This post was last edited by dongjiang1001 on 2011-9-1 15:30. Is there any difference between desalinated water and boiler water? How is it distinguished?
This post was last edited by dongjiang1001 on 2011-9-1 15:30. No, ammonia also needs to be added to the demineralized water before it enters the boiler.
This post was last edited by dongjiang1001 on 2011-9-1 17:44. What is the purpose of adding ammonia?
Reply to 3# chang06201101: Adjust the pH value so that the pH of the feed water is above 7 to prevent corrosion； According to boiler specifications, the pH of the boiler water should be between 10 and 12, in order to form a protective film of iron tetraoxide on the surface of the boiler.
Boiler water is the water inside the boiler. Desalinated water is makeup water that has been desalted; it, together with condensed water, constitutes the boiler feed water, which then enters the boiler after deoxygenation and heating (in systems with a heat recovery cycle). Boilers require desalinated water to be replenished because they experience various types of steam and water losses, including: blowdown losses, losses in the heating network (as heat generation results in less condensate returning compared to the amount of steam supplied), internal steam and water losses within the plant (such as leaks in valves and exhaust steam losses), and so on. These losses need to be compensated for with desalinated water.
Desalinated water is water from which various ions have been removed. Boiler water is used in boilers, and to prevent corrosion, certain amounts of phosphate ions and ammonium ions are added to it.