Drum sizing estimation 1

[pootong]

Dear All
Can anyone suggest me how to estimate the size of boiler steam drum? Is there any rule of thumb or sizing guideline?
Regards
Pootong

 

[boilerdoc]

Steam drum design can not be done by rule of thumb or any tables.It depends very much of the boiler type and of course the boiler capacity.I don´t think it is very helpful to give any figures like m3/t of steam produced.

 

[pootong]

Thanks Setra
Can you give me any guideline to estimate the suitable size of steam drum?
Regards
Pootong

 

[inatomi]

CAN YOU SHOW ME WHERE I CAN LEARN ABOUT BOILER VOCABULARIES (TECHNICAL TERMS)
THANKS A LOT
YEN

 

[davefitz]

try reading a testbook , such as "steam" by Babcock and Wilcox.

The steam drum's primary purpose is to separate steam from water, since a 2 phase mixture is discharged from the heated risers. This purpose nearly always governs its size. The steam and water are separated by a combination of cyclone separators and demisters. Each of these 2 components has a capacity based on operating pressure and required steam purity leaving the drum. If the boiler is a "natural circulation" boiler, then one also must limit the allowable pressure drop thru the separator to not more than 2 ft liquid. The drum is sized to be big enough to fit all the required separators and demisters.

A secondary purpose is to distribute feedwater to all downcomers evenly, and to avoid steam carryunder tot he downcomers.

 

[davefitz]

try reading a testbook , such as "steam" by Babcock and Wilcox.

The steam drum's primary purpose is to separate steam from water, since a 2 phase mixture is discharged from the heated risers. This purpose nearly always governs its size. The steam and water are separated by a combination of cyclone separators and demisters. Each of these 2 components has a capacity based on operating pressure and required steam purity leaving the drum. If the boiler is a "natural circulation" boiler, then one also must limit the allowable pressure drop thru the separator to not more than 2 ft liquid. The drum is sized to be big enough to fit all the required separators and demisters.

A secondary purpose is to distribute feedwater to all downcomers evenly, and to avoid steam carryunder tot he downcomers.

Another excellent book is by S. Kakac " boilers, evaporators, and condensers"