Abstract: A numerical simulation model of co-processing oil sludge in pulverized coal boiler was constructed based on the Euler-Lagrange model, the kinetic analysis of the volatilization of oil sludge was carried out. A 300 MW boiler of a coal-fired power plant was taken as an example， the influence of co-processing of oil sludge on the thermal regulation in the pulverized coal boiler was studied. The changes of temperature distribution， flue gas composition distribution and volatile in the pulverized coal boiler under different co-processing quantities were calculated. The results showed that the co-processing of oil sludge could promote the release of volatile from pulverized coal and the combustion of coke. When the co-processing amount increased， the highest temperature in the main combustion zone increased and the concentration of CO decreased. Under the calculation condition， when the co-processing amount was 5%， the average temperature in the furnace combustion zone and the burnout zone changed the least, and the variation trend of each component concentration was similar to that of pure pulverized coal combustion, so the recommended co-processing amount was 5%.

Key words: oil sludge, pulverized coal combustion, co-processing, numerical simulation