Summary for aluminum deposit removal Discussion
Aluminum deposit removal in boiler tubes is the central issue in this thread. Cyrus Ghahari of a 200 MW power plant in Tehran asks how to chemically clean aluminum deposit complexes from the inside of boiler tubes when a normal HCl acid cleaning does not work, noting the boiler operates at 100 atm and uses Heller-type cooling towers. The excerpt does not include a posted answer or a confirmed cleaning procedure, so the thread mainly establishes the problem rather than a solution. The key practical takeaway is that standard hydrochloric acid cleaning was reported ineffective for these deposits, and any cleaning method for a high-pressure boiler would need to be chosen carefully with plant-specific engineering and safety considerations.
Q. We, at a 200 MW power plant, are using Heller-type cooling towers and the boiler tube’s inside surfaces are deposited with Al deposit complexes. What is the chemical cleaning procedure for this type of deposit? Usual HCl acid cleaning procedure does not remove the deposits. Boiler working pressure is 100 atm.
Cyrus Ghahari
– Tehran, IRAN
May 14, 2012