Properties of rubber lining after sixteen years operation in different places of FGD plant

摘要

After over 16 years of service at the inner walls of a steel absorber and outlet channel in wet FGD system, the rubber lining was subjected to examinations. A series of impedance spectra for the pre-vulcanized soft rubber lining based on chlorobutyl rubber (CIIR) were recorded. Rubber lining samples taken from the absorber bottom, which had been in contact with the washer sump solution, exhibited properties similar to those of new rubber lining samples not exposed to the corrosive environment. Rubber lining samples taken from the absorber upper part and from the outlet channel showed significant damage, and so deterioration in their protective properties, in comparison with the new lining. Also the results of tensile strength and hardness tests carried out on rubber samples taken from various parts of the absorber and the outlet channel are presented.