To remove the fouling attached on the surface of slag cooler

the specialty of fouling prevention and descaling in liquid-solid two-phase flow slag cooler was studied and the best possible condition of fouling prevention and descaling in liquid-solid two– phase flow slag cooler was discussed.By studying the effects of shear stress of liquid-solid two phase flow and collision stress between the solid particles and dirt layers on slag removal

the liquid-solid two phase flow anti-fouling model was established

and the MATLAB simulation software was employed to investigate the relationship between and among the fouling wear rate

the maximum relative deviation of collision stress

the circulation velocity

the particle incidence angle and others.The results show that

the important factors of slag cooler prevention and removal include the circulation velocity

solid particle size

solid volume fraction and the solid particle incidence angle.The liquid-solid two-phase flow shear stress can only inhibit the production of fouling

but it cannot remove the fouling.Increasing the circulation velocity and solid volume fraction can increase the two-phase flow shear stress and particle collision stress

thus to realize fouling prevention and descaling.When the solid particle incidence angle was between 40°and 60°

and the circulate velocity reached 3m/s to 4m/s and the particle size is within the range from 6mm to 8mm

the fouling wear rate reached the maximum

and the maximum relative deviation of the collision stress was the minimum

indicating the fouling effect was the best under this condition.