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.
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
There are basically two types of boilers one is the conventional boilers with a drum or shell in which water (obviously well treated water) is heated and as it is heated it produce stem. The steam occupy the top space and the bottom part is filled with water hot and pressurised. When the process requirements whether it is for steam turbine or for chemical process we need dry steam. If the water level is too high and or if the boiling velocity is too high the water droplets instead of leaving the boiler drum as steam some water droplets leave with the steam. This is no good for the process as we need steam but we are getting water. This water entering the system is called entrainment. If the boiler is highly rated i.e. we are heating too much and heating very hard then the top of the water face on the drum through which the steam leaves takes water drops as well. This is called entrainment. Regards Stephen Pathmarajah
People drum(some)to get money as a job
The Japanese version of ORION is the drum.
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.
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 in cylindrical shape stress concentration is less so it can withstand at high pressure also.
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.
see results in attached link: Philips 3-drum 'Accessable' boiler
This is due to steam seperation the silica remains in the drum water.
Na3po4 dosing boiler drum is used mainly for two things. To soften calcium and magnesium to make them slushy and to increase phosphate.
see results in attached link: Philips 3-drum 'Accessable' boiler
A drumless boiler is obviously a boiler without a drum. The steam is fed into a header, then into a turbine for making electricity. Quality control of the water used is of extreme importance. Since there is no water level in a drum to maintain, feedwater must be constant with no interruption of any kind. With a drum type, water feed can be interrupted for a very short time. Not so with a drumless type.