chemical is used in sub critical boiler that is tri sodium phosphate added in durm.
The main purpose is raise in pH value , salt is converted in to sludge form
as the boiler drum is cylindrical in shape due to low stress concentration and in both end the diameter will be less.so for easy entry into the drum for a man the drum man hole is elliptical in shape.
Because the drum could rust through and release the chemicals, or be contacted by electricity and cause a fire...if you need to store toxic chemicals in a metal drum, you put a drum liner in first, and pour the chemicals into the liner. A drum liner is a very thick plastic bag.
Boiler pH boosters typically contain chemicals such as sodium hydroxide (NaOH) or tri-sodium phosphate (Na3PO4) to raise the pH of the water in the boiler system. These chemicals help to prevent corrosion and scale formation in the boiler by maintaining the water in the system at an optimal pH level.
Boiler preservation is necessary to prevent corrosion and rust formation when the boiler is not in operation for an extended period. It helps protect the internal surfaces of the boiler from damage and ensures that it can be safely and efficiently restarted when needed. Proper preservation also helps extend the lifespan of the boiler.
Using seawater as boiler feedwater can lead to the buildup of damaging deposits, such as salt and minerals, in the boiler system. This can result in corrosion, reduced efficiency, and potential equipment failure. It is important to properly treat and condition seawater before using it as boiler feedwater to prevent these issues.
The steam drum separated the steam from the water and stream mixture in the boiler drum.
Purpose of the boiler drum is to collect steam from all the various tubes in a boiler, and send it to the turbine to spin the generator
boiler drum diffferential pressure level calculation explained
Generator
Overheating of water wall tubes may cause crack. Boiler will damage due to boiler drum level goes down.
as the boiler drum is cylindrical in shape due to low stress concentration and in both end the diameter will be less.so for easy entry into the drum for a man the drum man hole is elliptical in shape.
see results in attached link: Philips 3-drum 'Accessable' boiler
The swelling and shrinking effect in a boiler drum refers to the physical changes in the drum's volume due to temperature variations and pressure changes during operation. When the boiler is heated, the water inside converts to steam, causing the drum to swell as the pressure increases and the water expands. Conversely, when the boiler cools down or experiences a drop in pressure, the drum may shrink as the steam condenses back into water. This phenomenon is important to consider for the structural integrity and safety of the boiler system.
This is due to steam seperation the silica remains in the drum water.
see results in attached link: Philips 3-drum 'Accessable' boiler
It recovers the energy in the chemicals and the chemicals themselves, which can then be reused.
Because the drum could rust through and release the chemicals, or be contacted by electricity and cause a fire...if you need to store toxic chemicals in a metal drum, you put a drum liner in first, and pour the chemicals into the liner. A drum liner is a very thick plastic bag.