What is VGB standard?
What is VGB standard?
In general the VGB-Standard covers steady state/full load operation of those boilers as well as start up operation mode by using action levels. This concept allows a quite flexible approach to combine requirements of the materials used throughout the water-steam cycle with economical needs of the plant operator.
What should be the conductivity of boiler feed water?
When you’re looking to measure the conductivity of your boiler water, it’s important that you keep the conductivity of the water at a certain level. If you want to prevent corrosion in your boiler, the water should have a conductivity reading that’s below 3,000 PPM, which equates to 6,000 µS/cm.
What is the pH of boiler feed water?
Boiler water should be maintained at pH 11. Generally, the higher the pH (basic), the less soluble some solids are in the water. The lower the pH (acidic), the more soluble these solids are. 4.3.
What temperature is boiler feed water?
between 185 and 195°F
Most feedwater tanks are equipped with a steam sparger, which heats the tank with steam from the boiler. The temperature of the feedwater tank should be maintained between 185 and 195°F (85 and 90°C) to reduce the amount of oxygen in the water.
What causes high TDS in boiler water?
As water is boiled within the boiler and steam is produced, then the solids remain in the water and concentrate. Thus, over time the level of total dissolved solids (TDS) increases. Further evaporation causes these dissolved solids to come out of solution, and to produce suspended solids (sludge).
Why ammonia is dosed in boiler?
Ammonia – to maintain pH range in boiler feed water which further helps in stability of protective layer inside boiler tubes, this protective layer prevents oxidation.
Why deaerator is kept at height?
Why are deaerators placed at height? Deaerators are placed at height to provide sufficient NPSHa (Net Positive Suction Head available) to the boiler feedwater pumps – the boiler feed pumps are typically situated low in the ship for the same reason.
How do I lower the TDS in my boiler water?
Consider installing a water softener, reverse osmosis (RO), or a demineralizer. These remove impurities like hardness and TDS from the make-up water and allow for increased boiler cycles. The higher the cycles, less water will need to be purged from the boiler and will reduce your boiler plant water usage.
How can reduce TDS?
Ways to Reduce or Remove TDS in Water
- Reverse Osmosis (R.O.) Reverse Osmosis removes TDS by forcing the water, under pressure, through a synthetic membrane.
- Distillation. The process involves boiling water to produce water vapor.
- Deionisation (DI)