What will be the influence of using more alkaline or acidic water in boilers?
Acidic pH values will cause attack on the boiler metal with resultant solution and corrosion of the metal. Corrosion is general in nature over the entire surface, with some localized attack.
What happens if alkalinity is too high in water?
If your alkalinity level becomes too high, it will become difficult to change the pH. You’ll know your pH is too high when your pool water is cloudy, there is scale build up on your pool walls and your chlorine is no longer successfully sanitizing your pool.
What problems will occur when hard and alkaline water is used in boilers?
Hard water that’s filled with minerals like calcium and magnesium can cause damage to the tubes inside water boilers. If these minerals are present in the boiler’s water supply, it can lead to limescale forming on the surface of the tubes, which has the potential to cause overheating and tube failure.
What is alkalinity in boiler feed water?
Alkalinity in steam-generating boilers is a problem because under heat the alkalinity breaks down to carbon dioxide, which passes with the steam. The alkalinity is principally carbonate (CO3) or bicarbonate (HCO3) anions, which can be expressed in parts per million or as grains per gallon. One gpg equals 17.1 ppm.
What is the standard value of hydrazine in boiler water?
The normal level of hydrazine reserve to be maintained in the boiler water is between 0.1 and 0.3 ppm N2H4. As the products of reaction are harmless – nitrogen as and water, hydrazine treatment does not increase the dissolved solids content of the boiler water.
What should be pH value of water used in boiler?
Boiler pH. Natural water is usually between 6.5 and 7.5 pH. A common recommendation is to maintain boiler water at 8.5 pH.
What is more important pH or alkalinity?
Regardless of the starting pH, the higher the alkalinity of the water source, the more acid is required to reduce pH to 5.0. For all water sources, it is the alkalinity that actually determines how much acid to use, not the pH.
Does high alkalinity cause cloudy water?
Pool water with a high total alkalinity (TA) is often associated with cloudiness. This is because it can cause an imbalance in the pH levels and lead to calcium scaling. Typically if your TA is higher than 200 ppm, you’re at risk of a cloudy pool and just like imbalanced pH levels, your chlorine will be less effective.
What are boiler troubles?
Boiler troubles: Sludge, scale, priming and foaming, caustic embrittlement, boiler corrosion are collectively known as boiler troubles. A. Caustic Embrittlement: (Inter crystalline cracking of boiler metal) It is the intercrystalline cracking of boiler due to Na2CO3.
Why Hard water is harmful for boiler?
hard water is water that contains a high concentration of minerals , usually calcium and magnesium. these minerals do not volatilize with the steam and continues to build up in the boiler , precipitating out on the watersides as scale. hence, using hard water in boilers can lead to boiler explosions.
What causes low pH in boiler water?
A low boilerwater pH is usually caused by contamination of the boiler feedwater, from sources such as hydrochloric or sulfuric acid from leaks in demineralizers and condenser leaks of cooling tower water.
Why is alkalinity important in a boiler?
Alkalinity is a key control parameter for boilers (outside of the prescribed operating range, it can lead to corrosion, caustic metal embrittlement, and carryover) and cooling water systems (where it has a significant effect on chemical treatments for scale and corrosion inhibition).
Why is alkalinity important in boiler water?
Testing Alkalinity In Boiler Water. Alkalinity is a key control parameter for boilers (outside of the prescribed operating range, it can lead to corrosion, caustic metal embrittlement, and carryover) and cooling water systems (where it has a significant effect on chemical treatments for scale and corrosion inhibition).
What happens if the pH of water in a boiler is too high?
But in case pH is too much Alkaline (Above 10 pH) it causes issues like Caustic embrittlement and Alkalinity of the boiler water helps in reducing corrosion of the boiler tubes. However water needs to be demineralised and pH increased with suitable chemicals in order to prevent scaling and other deposits .
What is alkalinity and why is it important?
Alkalinity is a key control parameter for boilers (outside of the prescribed operating range, it can lead to corrosion, caustic metal embrittlement, and carryover) and cooling water systems (where it has a significant effect on chemical treatments for scale and corrosion inhibition). P, M, and T
What is alkalinity and why does it matter in cooling water?
In cooling water, treatment professionals aim to control alkalinity (and pH) to prevent corrosion and scaling. Below acceptable levels, these parameters can contribute to corrosion. The higher the pH, the more alkalinity is present in the carbonate species, which can react with calcium in the water to form scale.