Waste Incineration Furnace Superheater Hci High Temperature Corrosion Research

The metal of MSW boiler suffers more accidents than the burning coal boiler' s, and it becomes the most high-frequency in gas-water system accidents. Nowadays, the corrosion of HC1 which isn' t very serious in burning-coal boiler becomes stand out in MSW boiler. This thesis dedicates to studying the mechanism of the corrosion of HC1 in MSW boiler superheater sector.At present the main work is for the effect factors of chloridizing corrosion, the way of HC1 penetrates to the boundary of metal base and corrosive film, then a dynamics model will be founded. All these is for developing the essence of chloridizing corrosion, preventing material invalidation, prolonging the life of MSW boiler, increasing the operational parameter and increasing the generating efficiency.This thesis classifies HC1 high-temperature corrosion, and analyses every kind corrosion at length, indicates the effect factors and how they affect the corrosion. Then the methods to prevent HC1 high-temperature corrosion are gived.Corrosion experiments are carried out by simulating the atmosphere of boiler' s superheater seator. Then corrosion constant temperature dynamics curves are drawed. The corrosion products are tested by SEM, XRD, EDX. At last how the corrosion changes by temperature, HC1 content and metal can be detected. Meanwhile a test is carried out in Qiaosi jingjiang MSW power station No. 1 boiler, then a fact in MSW boiler that corrosion about chlorine is most serious than Sulfur is found.The curves of add weightiness of corrosion is translated into the thermal dynamic curves, so we can judge the corrosion mechanism by the thermal analysis. The method is fresh and innovation, which made the means of researching and the content enriched.