Condensation of co 2 inhibition crystal modification and sludge dispersion to ensure clean in the condensate system results in the formation of highly corrosive carbonic acid h 2 co 3.
Boiler feed water specifications.
Boiler drum operating pressure kg cm 2 g parameters.
In the steam drum the feed water is then turned into steam from the heat.
After the steam is used it is then dumped to the main condenser.
According to en 12953 10 an oxygen concentration of 0 05 mg l is allowed in the boiler feed water of shell boilers with an operating pressure 20 bar thus differing from the above requirements.
Feed water boiler water characteristics as per is 10392 1982 1 feed water parameters upto 20 kg cm2 21 kg cm2 to 39 kg cm2 40 kg cm2 to 59 kg cm2 unit total hardness 10 1 0 0 5 ppm as caco 3 ph value 8 5 9 5 8 5 9 5 8 5 9 5 dissolved oxygen 0 1 0 02 0 01 as ppm silica 5 0 5 as ppm sio 2.
Some impurities such as hardness iron and silica are of more concern for example than sodium salts.
3 3 5 make up water is the major source of carbon dioxide.
Pitting can result with possible rupture of boiler condensate piping or boiler tubes.
Boiler feedwater is an essential part of boiler operations.
The purity requirements for any feed water depend on how much feed water is used as well as what the particular boiler design pressure heat transfer rate.
Each one can be customized for any particular requirement.
Boiler feed water specifications.
Much more importantly the presence of oxygen.
Boiler feed water properties depended upon boiler operating pressure.
According to boiler operating pressure the specifications of feed water as follow as.
From the condenser it is then pumped to the deaerated feed tank.
The feed water is put into the steam drum from a feed pump.
3 3 4 rusty water in the boiler gage glass is a sure sign of acid corrosion in the boiler feedwater condesate system or in the boiler itself.
Removal of carbon dioxide and oxygen from boiler feedwater is essential to preventing boiler system corrosion.
Listed below are sample specifications to assist engineers and others who wish to specify superior boiler on new projects.
Boiler feed water asme guidelines for water quality in modern industrial water tube boilers for reliable continuous operation boiler water.
