Estimation of residual life time of rectification column of ethylene production under action of wind load and atmospheric corrosion

Keywords

distillation column, residual life time, energy approach, stress intensity factor, crack opening, shunting load mode.

Cite as

Andreikiv O. Ye., Dolinska I. Ya., Zviagin N. S., and Bobryk K. R. Estimation of residual life time of rectification column of ethylene production under action of wind load and atmospheric corrosion. Physico­chemical Mechanics of Materials. 2022. 58(4), 013-019.

Abstract

Using the energy approach formulated earlier by the authors, a mathematical model is con­structed, which in turn is the basis of the calculation method for predicting the residual life of the distillation column for production of ethylene under the action of wind load and atmo­spheric corrosion. It should be noted that the wind load is shunting in nature – a constant pressure on the column with frequent gusts. It is believed that in the girth weld, to which the column is attached to the base, there is an external surface corrosion-mechanical crack, into which the corrosive environment penetrates. Such a corrosive environment together with the shunting wind load intensifies its propagation to the size, which causes failure of the column. Using the energy approach, this problem is reduced to special differential equations with special delta functions, which are solved approximately for a large number of wind gusts. With the help of this method the dependence of the residual life time of the 09G2С steel column on the number of wind gusts are investigated.

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