Boiler Restart Procedure after Cleaning
Boiler Restart Procedure after Cleaning
(OP)
I have heard conflicting arguments about the restart of a boiler after being chemically cleaned (or after lay-up). One method employs the rechraging of the boiler with normal boiler feed water (140ºF) while the other uses "ambient" water. It seems logical to me that boiler feedwater should be used versus city water, but the latter argument stresses that the temperature of the boiler feed water might "shock" the tubes????? I could use some insight here please!





RE: Boiler Restart Procedure after Cleaning
RE: Boiler Restart Procedure after Cleaning
The temperature criteria is typically something like a maximum difference of 60°C-80°C/140°F-175°F (mainly depending on the drum thickness) between water and metal temperature (assumed to be ambiant temperature after layup for a few weeks).
RE: Boiler Restart Procedure after Cleaning
Typically for thermal shock as long as the delta T between the metal and feedwater temperature is less than 150 deg F you should be ok. My main concern would be to assure that untreated feedwater does not enter your tube circuit.
RE: Boiler Restart Procedure after Cleaning
Thanks again.
RE: Boiler Restart Procedure after Cleaning