Heat Recovery Steam Generator Cleaning Method

BHEL, surely have the best answer.

It seems there is a problem with not enough combustion air getting to the fuel. Once the cleaning is complete and the plant is on its way to re-assembly, the combustion route needs to be looked at to make sure there is sufficient-to-slightly-excess air available, because there shouldn't be any sulphur on the tubes in the first place.

Flue gas desulpurisation is a second issue, as these days, obnoxious sulphur emissions into the atmosphere are bad news for the environment as well as personal health and safety.

Something is amiss at that facility, and the sulphur deposits are the indicator.

Steam cleaning followed by air cleaning will help you in getting the system cleaned thoroughly.it is advisable to trace the cause for sulphur deposits.

R.Sethuraman

Consultant/Water Chemistry&Corrosion

I have no experience in this field So please excuse my ignorance in this matter but I have a question regarding the environmental protection regulations, I know these will change depending on what country you are in.

What precautions need to be used in the removal of the sulphur deposits to prevent contamination of the local environment, drains & water ways ?

& do these regulations dictate the way in which the deposits are removed so as to be able to be collected & disposed of appropriately?

Have the plant manger take the local environmental inspector out for dinner to talk about how this should be done.

While he is being wined and dined hose the waste straight down the drain.

Night time is preferable.

I'd go for dry ice blasting, if it is an option that somebody there will pony up the money for, for no other reason than it sounds like it could be fun.

(<1% sulphur) > (0% sulphur). Perhaps the deposition is normal and preferable to gaseous sulphur compounds being chimnied into the air.

What does the manual (or original commissioning report) say about it?