Abstract
The prevention of damage to super-heater tubes due to high-temperature corrosion caused by various components in MSW is a key to the wider dissemination of waste power generation. To suppress corrosion by using additives is one type of effective method. In these methods, however, it is important to minimize the amounts of additives used, because of increasing additive costs and ash treatment amounts.
In this study, for the purpose of selecting additives with high capabilities, several additives were compared and evaluated using laboratory tests that simulated the environment of an actual stoker-type waste incinerator boiler.
As a result, the suppression effect of natural zeolite was found to be the highest among the tested samples. Natural zeolite was mixed in deposit ash collected from an actual plant and tested, and the suppression effect was observed to be between 5 and 25 mass-%. It was also found that zeolite captures gaseous corrosive components and acid gases. The former suggests the possibility of an even greater suppression effect when used in actual plants. The latter shows the possibility of being applicable as an acid gas treatment agent.
