Research Progress on Corrosion and Protection of Water System for Coal Gasification
As the"blood"circulatory system of coal gasification plant,the water system frequently faces corrosion and leakage problems due to the complex environment with high solid content,corrosive media and high temperature and pressure,which seriously affect the safty of production operation.The corrosion mechanism of the water system was explained,which included erosive wear,cavitation,electro-chemical corrosion triggered by CO2,H2S,HCOOH and other acidic media,chloride stress corrosion in-duced by Cl-,and multiple corrosion caused by NH4+,CN-and other nitrogen ions.The corrosion-prone sites of the water system were also introduced.Moreover,combined with the actual research of coal gas-ification devices,the protective measures against corrosion were analyzed and summarized in term of the material selection,device/process design and monitoring management.Establishing an intelligent cor-rosion risk prediction system for equipment/pipeline was proposed.These strategies shed light on im-provement of corrosion status in coal gasification industry.
NETL
NSTL
万方数据
维普
