Na3po4 dosing boiler drum is used mainly for two things. To soften calcium and magnesium to make them slushy and to increase phosphate.
Morpholine is often preferred over ammonia for dosing in boiler feed water because it has lower volatility, lower potential for corrosion, and it offers better pH stability. Additionally, morpholine provides effective protection against both acidic and alkaline corrosion in the boiler system, making it a more versatile and reliable option compared to ammonia dosing.
Na3PO4
Na3PO4(aq) = 3Na^(+) (aq) + PO4^(3-) (aq) 'NB ' 'aq' is for 'aqueous' , from Latin for 'water'.
Sodium phosphate (Na3PO4).
The net ionic equation for Na3PO4 is 3Na+ + PO4^3- -> Na3PO4. This equation shows that the sodium ion (Na+) and phosphate ion (PO4^3-) combine to form sodium phosphate (Na3PO4) without any spectator ions.
hp dosing used for precipitate the silica from bfw in drum and lp dosing used for increase the ph in boiler to maintain 9.5 to 10.5
For softening calsium or magnecium hardness and its become slury, other effect is by used phosphate can increased the Ph value. Shakhawat
Generally the Phosphate dozing is done in the drum of the boiler. it helps to convert the calcium hard salts to soft sludges. the sludges are higher in weight ,so it comes to the bottem of the drum . then it remove by CBD. this is one of the way of avoiding corrosion in Boiler. Vijay RAMCO
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.
Morpholine is often preferred over ammonia for dosing in boiler feed water because it has lower volatility, lower potential for corrosion, and it offers better pH stability. Additionally, morpholine provides effective protection against both acidic and alkaline corrosion in the boiler system, making it a more versatile and reliable option compared to ammonia dosing.
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.
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.
see results in attached link: Philips 3-drum 'Accessable' boiler