When should be the industrial boiler applied chemical cleaning?
When should be the industrial boiler applied chemical cleaning?
(OP)
Could someone please explain When the industrial boiler should be applied chemical cleaning?
Regards
Regards





RE: When should be the industrial boiler applied chemical cleaning?
RE: When should be the industrial boiler applied chemical cleaning?
I wish I could show you a few images of the boiler.
RE: When should be the industrial boiler applied chemical cleaning?
I think I have photos (not electronic) of scale deposits so thick that when they came out of the tubes, they looked themselves like pieces of tubing. When the tubing cleaners finished running, the workers cleaned up the chips of scale with shovels.
rmw
RE: When should be the industrial boiler applied chemical cleaning?
The Betz (now GE Water) and Nalco industrial water conditioning handbooks have good general information on chemical cleaning of industrial boilers. Specific parameters such as the type of agents, solution concentration, recirculation time, cleaning system configuration, recirculation rate, and solution temperature will have to be determined by someone with expertise in this area.
RE: When should be the industrial boiler applied chemical cleaning?
The analysis of deposit follow as:
Cao: 31.8 wt%
P2O5: 20.3 wt%
Fe2O3: 33.6 wt%
SiO2:5.6 wt%
MgO: 5.2 wt%
Best regards
RE: When should be the industrial boiler applied chemical cleaning?
The Ca, Mg, & Si in the deposit are indicative of a inoperative, malfuctioning or non-existant make-up water pre-treatment system. Pre-treatment of the make-up water and possibly condensate polishing are critical. Feeding treatment chemicals to compensate for poor feedwater quality is cost prohibitive and marginally effective.
You will have to take steps to improve the feedwater quality or be faced with periodic mechanical and chemical cleaning of the boiler water-sides along with a significantly reduced service life.
RE: When should be the industrial boiler applied chemical cleaning?
That's right, but our feed water quality isn't troubling now (Conduct:6~7). However the feed water quality was very worrying 4 years ago.
Since we use dispersant based on inorganic phosphates, the deposits is soft and non- adherent.
what is our problem?
Thank you for your attention
RE: When should be the industrial boiler applied chemical cleaning?
RE: When should be the industrial boiler applied chemical cleaning?
Did you clean the boiler when you begin the current water treatment process? If not your present treatment maybe altering the physical properties of an existing scale.
What are your blowdown parameters?
What size is you boiler and is it amenable to chemical or mechanical cleaning?
Have you discussed your problem with your chemical supplier? There could be some alteration to your present chemical treatment that might mitigate your problem.
RE: When should be the industrial boiler applied chemical cleaning?
Worst scaled boiler I ever saw was in a plant where they pumped their make-up water (and they had a high make-up percentage) from a nearby stream to a holding pond on the plant site and took the boiler make-up from there. The plant got cited for violating rules about discharging their boiler blowdown into a public waterway and the mental midget plant manager ordered that the boiler blowdown just be re-routed to the holding pond. Problem solved!!!!
It took a while for the detrimental effects to show up and when they did, it wasn't pretty - but it did feed my children for a while, though.
rmw